[852] | 1 | #include <stdio.h>
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| 2 | #include <stdlib.h>
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| 3 | #include <memory.h>
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| 4 | #include <assert.h>
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| 5 | #include "pbuffer.h"
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| 6 |
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| 7 | #if defined(MACOS)
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| 8 | #include <OpenGL/gl.h>
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| 9 | #include <GLUT/glut.h>
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| 10 | #else
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| 11 | #include <GL/gl.h>
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| 12 | #include <GL/glext.h>
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| 13 | #include <GL/glut.h>
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| 14 | #endif
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| 15 |
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| 16 | #include <glh/glh_extensions.h>
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| 17 |
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| 18 | #include <string>
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| 19 | #include <vector>
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| 20 | #include ".\pbuffer.h"
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| 21 |
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| 22 | using namespace std;
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| 23 |
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| 24 | #ifndef PB_FPF
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| 25 | // #if defined DEBUG || defined _DEBUG
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| 26 | #define PB_FPF fprintf
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| 27 | // #else
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| 28 | // #define PB_FPF
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| 29 | // #endif
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| 30 | #endif
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| 31 |
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| 32 | #if defined(WIN32)
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| 33 |
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| 34 | PBuffer::PBuffer(const char *strMode, bool managed)
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| 35 | : m_hDC(0), m_hGLRC(0), m_hPBuffer(0), m_hOldGLRC(0), m_hOldDC(0),
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| 36 | m_bIsTexture(false), m_iWidth(0), m_iHeight(0), m_strMode(strMode),
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| 37 | m_bSharedContext(false), m_bShareObjects(false), m_bIsBound(false),
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| 38 | m_bIsActive(false), m_bManaged(managed)
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| 39 | {
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| 40 | m_pfAttribList.push_back(WGL_DRAW_TO_PBUFFER_ARB);
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| 41 | m_pfAttribList.push_back(true);
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| 42 | m_pfAttribList.push_back(WGL_SUPPORT_OPENGL_ARB);
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| 43 | m_pfAttribList.push_back(true);
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| 44 |
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| 45 | m_pbAttribList.push_back(WGL_PBUFFER_LARGEST_ARB);
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| 46 | m_pbAttribList.push_back(true);
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| 47 |
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| 48 | PB_FPF(stdout, "Declare a Pbuffer with \"%s\" parameters\n", strMode);
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| 49 | m_strMode = strMode;
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| 50 | parseModeString(m_strMode, &m_pfAttribList, &m_pbAttribList);
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| 51 |
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| 52 | m_pfAttribList.push_back(0);
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| 53 | m_pbAttribList.push_back(0);
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| 54 |
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| 55 |
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| 56 | }
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| 57 |
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| 58 | PBuffer::~PBuffer()
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| 59 | {
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| 60 | if (m_bManaged)
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| 61 | Destroy();
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| 62 | }
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| 63 |
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| 64 | // This function actually does the creation of the p-buffer.
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| 65 | // It can only be called once a window has already been created.
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| 66 | bool PBuffer::Initialize(int iWidth, int iHeight, bool bShareContexts, bool bShareObjects)
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| 67 | {
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| 68 | HDC hdc = wglGetCurrentDC();
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| 69 | HGLRC hglrc = wglGetCurrentContext();
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| 70 | int format = 0;
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| 71 | int nfattribs = 0;
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| 72 | int niattribs = 0;
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| 73 |
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| 74 | m_iWidth = iWidth;
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| 75 | m_iHeight = iHeight;
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| 76 |
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| 77 | m_bSharedContext = bShareContexts;
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| 78 | m_bShareObjects = bShareObjects;
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| 79 |
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| 80 | if (m_bSharedContext)
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| 81 | {
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| 82 | // Get the pixel format for the on-screen window.
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| 83 | format = GetPixelFormat(hdc);
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| 84 | if (format == 0)
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| 85 | {
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| 86 | PB_FPF(stderr, "pbuffer creation error: GetPixelFormat() failed\n");
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| 87 | return false;
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| 88 | }
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| 89 | }
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| 90 | else
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| 91 | {
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| 92 | unsigned int nformats;
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| 93 | wglChoosePixelFormatARB(hdc, &m_pfAttribList[0], NULL, 1, &format, &nformats);
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| 94 | if (nformats == 0)
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| 95 | {
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| 96 | PB_FPF(stderr, "pbuffer creation error: Couldn't find a suitable pixel format.\n");
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| 97 | return false;
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| 98 | }
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| 99 | }
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| 100 |
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| 101 | m_hPBuffer = wglCreatePbufferARB(hdc, format, m_iWidth, m_iHeight, &m_pbAttribList[0]);
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| 102 | if (!m_hPBuffer)
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| 103 | {
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| 104 | DWORD err = GetLastError();
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| 105 | PB_FPF(stderr, "pbuffer creation error: wglCreatePbufferARB() failed\n");
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| 106 | if (err == ERROR_INVALID_PIXEL_FORMAT)
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| 107 | {
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| 108 | PB_FPF(stderr, "error: ERROR_INVALID_PIXEL_FORMAT\n");
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| 109 | }
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| 110 | else if (err == ERROR_NO_SYSTEM_RESOURCES)
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| 111 | {
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| 112 | PB_FPF(stderr, "error: ERROR_NO_SYSTEM_RESOURCES\n");
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| 113 | }
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| 114 | else if (err == ERROR_INVALID_DATA)
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| 115 | {
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| 116 | PB_FPF(stderr, "error: ERROR_INVALID_DATA\n");
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| 117 | }
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| 118 |
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| 119 | return false;
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| 120 | }
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| 121 |
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| 122 | // Get the device context.
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| 123 | m_hDC = wglGetPbufferDCARB(m_hPBuffer);
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| 124 | if (!m_hDC)
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| 125 | {
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| 126 | PB_FPF(stderr, "pbuffer creation error: wglGetPbufferDCARB() failed\n");
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| 127 | return false;
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| 128 | }
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| 129 |
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| 130 | if (m_bSharedContext)
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| 131 | {
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| 132 | // Let's use the same gl context..
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| 133 | // Since the device contexts are compatible (i.e. same pixelformat),
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| 134 | // we should be able to use the same gl rendering context.
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| 135 | m_hGLRC = hglrc;
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| 136 | }
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| 137 | else
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| 138 | {
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| 139 | // Create a new gl context for the p-buffer.
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| 140 | m_hGLRC = wglCreateContext(m_hDC);
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| 141 | if (!m_hGLRC)
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| 142 | {
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| 143 | PB_FPF(stderr, "pbuffer creation error: wglCreateContext() failed\n");
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| 144 | return false;
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| 145 | }
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| 146 |
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| 147 | if(m_bShareObjects)
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| 148 | {
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| 149 | if(!wglShareLists(hglrc, m_hGLRC))
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| 150 | {
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| 151 | PB_FPF(stderr, "pbuffer: wglShareLists() failed\n");
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| 152 | return false;
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| 153 | }
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| 154 | }
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| 155 | }
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| 156 |
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| 157 | GLint texFormat = WGL_NO_TEXTURE_ARB;
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| 158 | wglQueryPbufferARB(m_hPBuffer, WGL_TEXTURE_FORMAT_ARB, &texFormat);
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| 159 |
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| 160 | if (texFormat != WGL_NO_TEXTURE_ARB)
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| 161 | m_bIsTexture = true;
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| 162 |
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| 163 | // Determine the actual width and height we were able to create.
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| 164 | wglQueryPbufferARB(m_hPBuffer, WGL_PBUFFER_WIDTH_ARB, &m_iWidth);
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| 165 | wglQueryPbufferARB(m_hPBuffer, WGL_PBUFFER_HEIGHT_ARB, &m_iHeight);
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| 166 |
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| 167 | PB_FPF(stdout, "Created a %d x %d pbuffer\n", m_iWidth, m_iHeight);
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| 168 |
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| 169 | #ifdef _DEBUG
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| 170 | // query pixel format
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| 171 | int iattributes[] = {
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| 172 | WGL_RED_BITS_ARB,
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| 173 | WGL_GREEN_BITS_ARB,
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| 174 | WGL_BLUE_BITS_ARB,
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| 175 | WGL_ALPHA_BITS_ARB,
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| 176 | WGL_FLOAT_COMPONENTS_NV,
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| 177 | WGL_DEPTH_BITS_ARB,
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| 178 | WGL_SAMPLES_EXT,
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| 179 | WGL_AUX_BUFFERS_ARB
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| 180 | };
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| 181 | int ivalues[sizeof(iattributes) / sizeof(int)];
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| 182 |
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| 183 | if (wglGetPixelFormatAttribivARB(m_hDC, format, 0, sizeof(iattributes) / sizeof(int), iattributes, ivalues)) {
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| 184 | PB_FPF(stdout, "r:%d g:%d b:%d a:%d float:%d depth:%d samples:%d aux:%d\n",
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| 185 | ivalues[0], ivalues[1], ivalues[2], ivalues[3], ivalues[4], ivalues[5], ivalues[6], ivalues[7]);
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| 186 | }
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| 187 | #endif
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| 188 |
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| 189 | return true;
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| 190 | }
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| 191 |
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| 192 | void PBuffer::Destroy()
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| 193 | {
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| 194 | if (m_hPBuffer)
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| 195 | {
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| 196 | if (!m_bSharedContext) wglDeleteContext(m_hGLRC);
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| 197 | wglReleasePbufferDCARB(m_hPBuffer, m_hDC);
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| 198 | wglDestroyPbufferARB(m_hPBuffer);
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| 199 | }
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| 200 | }
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| 201 |
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| 202 | void PBuffer::parseModeString(const char *modeString, vector<int> *pfAttribList, vector<int> *pbAttribList)
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| 203 | {
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| 204 | if (!modeString || strcmp(modeString, "") == 0)
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| 205 | return;
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| 206 |
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| 207 | m_iBitsPerComponent = 8;
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| 208 | m_iNComponents = 0;
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| 209 | bool bIsFloatBuffer = false;
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| 210 | bool bIsATIFloatBuffer = false;
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| 211 | bool bIsTexture = false;
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| 212 | bool bNeedAlpha = false;
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| 213 |
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| 214 | m_HasDepthTexture=false;
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| 215 | m_HasAuxBuffers=false;
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| 216 |
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| 217 | char *mode = strdup(modeString);
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| 218 |
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| 219 | vector<string> tokens;
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| 220 | char *buf = strtok(mode, " ");
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| 221 | while (buf != NULL)
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| 222 | {
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| 223 | if (strstr(buf, "ati_float") != NULL)
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| 224 | bIsATIFloatBuffer = true;
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| 225 | else if (strstr(buf, "float") != NULL)
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| 226 | bIsFloatBuffer = true;
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| 227 |
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| 228 | if (strstr(buf, "texture") != NULL)
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| 229 | bIsTexture = true;
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| 230 |
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| 231 | if (strstr(buf, "alpha") != NULL)
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| 232 | bNeedAlpha = true;
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| 233 |
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| 234 | tokens.push_back(buf);
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| 235 | buf = strtok(NULL, " ");
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| 236 | }
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| 237 |
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| 238 | pfAttribList->push_back(WGL_PIXEL_TYPE_ARB);
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| 239 | #ifdef WGL_ATI_pixel_format_float
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| 240 | if (bIsATIFloatBuffer) {
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| 241 | pfAttribList->push_back(WGL_TYPE_RGBA_FLOAT_ATI);
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| 242 | } else
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| 243 | #endif
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| 244 | {
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| 245 | pfAttribList->push_back(WGL_TYPE_RGBA_ARB);
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| 246 | }
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| 247 |
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| 248 | for (unsigned int i = 0; i < tokens.size(); i++)
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| 249 | {
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| 250 | string token = tokens[i];
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| 251 |
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| 252 | if (token == "rgb" && (m_iNComponents <= 1))
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| 253 | {
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| 254 | /* pfAttribList->push_back(WGL_RED_BITS_ARB);
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| 255 | pfAttribList->push_back(m_iBitsPerComponent);
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| 256 | pfAttribList->push_back(WGL_GREEN_BITS_ARB);
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| 257 | pfAttribList->push_back(m_iBitsPerComponent);
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| 258 | pfAttribList->push_back(WGL_BLUE_BITS_ARB);
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| 259 | pfAttribList->push_back(m_iBitsPerComponent);*/
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| 260 | m_iNComponents += 3;
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| 261 | continue;
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| 262 | }
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| 263 | else if (token == "rgb") PB_FPF(stderr, "warning : mistake in components definition (rgb + %d)\n", m_iNComponents);
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| 264 |
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| 265 |
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| 266 | if (token == "rgba" && (m_iNComponents == 0))
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| 267 | {
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| 268 | /*pfAttribList->push_back(WGL_RED_BITS_ARB);
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| 269 | pfAttribList->push_back(m_iBitsPerComponent);
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| 270 | pfAttribList->push_back(WGL_GREEN_BITS_ARB);
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| 271 | pfAttribList->push_back(m_iBitsPerComponent);
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| 272 | pfAttribList->push_back(WGL_BLUE_BITS_ARB);
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| 273 | pfAttribList->push_back(m_iBitsPerComponent);
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| 274 | pfAttribList->push_back(WGL_ALPHA_BITS_ARB);
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| 275 | pfAttribList->push_back(m_iBitsPerComponent);*/
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| 276 | m_iNComponents = 4;
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| 277 | continue;
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| 278 | }
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| 279 | else if (token == "rgba") PB_FPF(stderr, "warning : mistake in components definition (rgba + %d)\n", m_iNComponents);
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| 280 |
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| 281 | if (token == "alpha" && (m_iNComponents <= 3))
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| 282 | {
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| 283 | /*pfAttribList->push_back(WGL_ALPHA_BITS_ARB);
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| 284 | pfAttribList->push_back(m_iBitsPerComponent);*/
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| 285 | m_iNComponents++;
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| 286 | continue;
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| 287 | }
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| 288 | else if (token == "alpha") PB_FPF(stderr, "warning : mistake in components definition (alpha + %d)\n", m_iNComponents);
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| 289 |
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| 290 |
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| 291 | if (token == "r" && (m_iNComponents <= 1))// && bIsFloatBuffer)
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| 292 | {
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| 293 | /*pfAttribList->push_back(WGL_RED_BITS_ARB);
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| 294 | pfAttribList->push_back(m_iBitsPerComponent);*/
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| 295 | m_iNComponents++;
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| 296 | continue;
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| 297 | }
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| 298 | else if (token == "r") PB_FPF(stderr, "warning : mistake in components definition (r + %d)\n", m_iNComponents);
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| 299 |
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| 300 | if (token == "rg" && (m_iNComponents <= 1))// && bIsFloatBuffer)
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| 301 | {
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| 302 | /*pfAttribList->push_back(WGL_RED_BITS_ARB);
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| 303 | pfAttribList->push_back(m_iBitsPerComponent);
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| 304 | pfAttribList->push_back(WGL_GREEN_BITS_ARB);
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| 305 | pfAttribList->push_back(m_iBitsPerComponent);*/
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| 306 | m_iNComponents += 2;
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| 307 | continue;
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| 308 | }
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| 309 | else if (token == "r") PB_FPF(stderr, "warning : mistake in components definition (rg + %d)\n", m_iNComponents);
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| 310 |
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| 311 | if (token.find("depth") == 0)
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| 312 | {
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| 313 | pfAttribList->push_back(WGL_DEPTH_BITS_ARB);
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| 314 | pfAttribList->push_back(getIntegerValue(token));
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| 315 |
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| 316 | continue;
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| 317 | }
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| 318 |
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| 319 | if (token.find("stencil") == 0)
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| 320 | {
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| 321 | pfAttribList->push_back(WGL_STENCIL_BITS_ARB);
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| 322 | pfAttribList->push_back(8);
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| 323 |
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| 324 | continue;
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| 325 | }
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| 326 |
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| 327 | if (token.find("samples") == 0)
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| 328 | {
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| 329 | /* pfAttribList->push_back(WGL_SAMPLE_BUFFERS_ARB);
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| 330 | pfAttribList->push_back(1);
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| 331 | pfAttribList->push_back(WGL_SAMPLES_ARB);
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| 332 | pfAttribList->push_back(getIntegerValue(token));*/
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| 333 |
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| 334 | continue;
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| 335 | }
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| 336 |
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| 337 | if (token.find("aux") == 0)
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| 338 | {
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| 339 | m_HasAuxBuffers=true;
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| 340 | pfAttribList->push_back(WGL_AUX_BUFFERS_ARB);
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| 341 | pfAttribList->push_back(getIntegerValue(token));
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| 342 | continue;
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| 343 | }
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| 344 |
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| 345 | if (token == "double")
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| 346 | {
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| 347 | pfAttribList->push_back(WGL_DOUBLE_BUFFER_ARB);
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| 348 | pfAttribList->push_back(true);
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| 349 |
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| 350 | continue;
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| 351 | }
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| 352 |
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| 353 | if (token.find("ati_float") == 0)
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| 354 | {
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| 355 | m_iBitsPerComponent = getIntegerValue(token);
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| 356 | // type already set above
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| 357 | continue;
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| 358 |
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| 359 | } else if (token.find("float") == 0)
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| 360 | {
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| 361 | m_iBitsPerComponent = getIntegerValue(token);
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| 362 | //bIsFloatBuffer = true; done previously
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| 363 | pfAttribList->push_back(WGL_FLOAT_COMPONENTS_NV);
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| 364 | pfAttribList->push_back(true);
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| 365 |
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| 366 | continue;
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| 367 | }
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| 368 |
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| 369 | if (token.find("texture") == 0)
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| 370 | {
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| 371 | if (token.find("textureRECT") == 0 || bIsFloatBuffer)
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| 372 | {
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| 373 | pbAttribList->push_back(WGL_TEXTURE_TARGET_ARB);
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| 374 | pbAttribList->push_back(WGL_TEXTURE_RECTANGLE_NV);
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| 375 | }
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| 376 | else if (token.find("textureCUBE") == 0)
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| 377 | {
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| 378 | pbAttribList->push_back(WGL_TEXTURE_TARGET_ARB);
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| 379 | pbAttribList->push_back(WGL_TEXTURE_CUBE_MAP_ARB);
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| 380 | }
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| 381 | else
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| 382 | {
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| 383 | pbAttribList->push_back(WGL_TEXTURE_TARGET_ARB);
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| 384 | pbAttribList->push_back(WGL_TEXTURE_2D_ARB);
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| 385 | }
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| 386 |
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| 387 | if (bIsFloatBuffer || bIsATIFloatBuffer)
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| 388 | {
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| 389 | if(m_iNComponents == 0)
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| 390 | {
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| 391 | PB_FPF(stderr, "components not specified. assuming rgba...\n");
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| 392 | pfAttribList->push_back(WGL_RED_BITS_ARB);
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| 393 | pfAttribList->push_back(m_iBitsPerComponent);
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| 394 | pfAttribList->push_back(WGL_GREEN_BITS_ARB);
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| 395 | pfAttribList->push_back(m_iBitsPerComponent);
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| 396 | pfAttribList->push_back(WGL_BLUE_BITS_ARB);
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| 397 | pfAttribList->push_back(m_iBitsPerComponent);
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| 398 | pfAttribList->push_back(WGL_ALPHA_BITS_ARB);
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| 399 | pfAttribList->push_back(m_iBitsPerComponent);
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| 400 | m_iNComponents = 4;
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| 401 | }
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| 402 | }
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| 403 |
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| 404 | if (bIsFloatBuffer) {
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| 405 | switch(m_iNComponents)
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| 406 | {
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| 407 | case 1:
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| 408 | pfAttribList->push_back(WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_R_NV);
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| 409 | pfAttribList->push_back(true);
|
---|
| 410 |
|
---|
| 411 | pbAttribList->push_back(WGL_TEXTURE_FORMAT_ARB);
|
---|
| 412 | pbAttribList->push_back(WGL_TEXTURE_FLOAT_R_NV);
|
---|
| 413 | break;
|
---|
| 414 | case 2:
|
---|
| 415 | pfAttribList->push_back(WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_RG_NV);
|
---|
| 416 | pfAttribList->push_back(true);
|
---|
| 417 |
|
---|
| 418 | pbAttribList->push_back(WGL_TEXTURE_FORMAT_ARB);
|
---|
| 419 | pbAttribList->push_back(WGL_TEXTURE_FLOAT_RG_NV);
|
---|
| 420 | break;
|
---|
| 421 | case 3:
|
---|
| 422 | pfAttribList->push_back(WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_RGB_NV);
|
---|
| 423 | pfAttribList->push_back(true);
|
---|
| 424 |
|
---|
| 425 | pbAttribList->push_back(WGL_TEXTURE_FORMAT_ARB);
|
---|
| 426 | pbAttribList->push_back(WGL_TEXTURE_FLOAT_RGB_NV);
|
---|
| 427 | break;
|
---|
| 428 | case 4:
|
---|
| 429 | pfAttribList->push_back(WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_RGBA_NV);
|
---|
| 430 | pfAttribList->push_back(true);
|
---|
| 431 |
|
---|
| 432 | pbAttribList->push_back(WGL_TEXTURE_FORMAT_ARB);
|
---|
| 433 | pbAttribList->push_back(WGL_TEXTURE_FLOAT_RGBA_NV);
|
---|
| 434 | break;
|
---|
| 435 | default:
|
---|
| 436 | PB_FPF(stderr, "Bad number of components (r=1,rg=2,rgb=3,rgba=4): %d\n", m_iNComponents);
|
---|
| 437 | break;
|
---|
| 438 | }
|
---|
| 439 | }
|
---|
| 440 | else
|
---|
| 441 | {
|
---|
| 442 | switch(m_iNComponents)
|
---|
| 443 | {
|
---|
| 444 | case 3:
|
---|
| 445 | pfAttribList->push_back(WGL_BIND_TO_TEXTURE_RGB_ARB);
|
---|
| 446 | pfAttribList->push_back(true);
|
---|
| 447 |
|
---|
| 448 | pbAttribList->push_back(WGL_TEXTURE_FORMAT_ARB);
|
---|
| 449 | pbAttribList->push_back(WGL_TEXTURE_RGB_ARB);
|
---|
| 450 | break;
|
---|
| 451 | case 4:
|
---|
| 452 | pfAttribList->push_back(WGL_BIND_TO_TEXTURE_RGBA_ARB);
|
---|
| 453 | pfAttribList->push_back(true);
|
---|
| 454 |
|
---|
| 455 | pbAttribList->push_back(WGL_TEXTURE_FORMAT_ARB);
|
---|
| 456 | pbAttribList->push_back(WGL_TEXTURE_RGBA_ARB);
|
---|
| 457 | break;
|
---|
| 458 | default:
|
---|
| 459 | PB_FPF(stderr, "Bad number of components (r=1,rg=2,rgb=3,rgba=4): %d\n", m_iNComponents);
|
---|
| 460 | break;
|
---|
| 461 | }
|
---|
| 462 | }
|
---|
| 463 |
|
---|
| 464 | string option = getStringValue(token);
|
---|
| 465 | if (option == "depth")
|
---|
| 466 | {
|
---|
| 467 | m_HasDepthTexture=true;
|
---|
| 468 |
|
---|
| 469 | pfAttribList->push_back(WGL_BIND_TO_TEXTURE_DEPTH_NV);
|
---|
| 470 | pfAttribList->push_back(true);
|
---|
| 471 |
|
---|
| 472 | pbAttribList->push_back(WGL_DEPTH_TEXTURE_FORMAT_NV);
|
---|
| 473 | pbAttribList->push_back(WGL_TEXTURE_DEPTH_COMPONENT_NV);
|
---|
| 474 | }
|
---|
| 475 |
|
---|
| 476 | continue;
|
---|
| 477 | }
|
---|
| 478 |
|
---|
| 479 | if (token.find("mipmap") == 0 && bIsTexture)
|
---|
| 480 | {
|
---|
| 481 | pfAttribList->push_back(WGL_MIPMAP_TEXTURE_ARB);
|
---|
| 482 | pfAttribList->push_back(true);
|
---|
| 483 |
|
---|
| 484 | continue;
|
---|
| 485 | }
|
---|
| 486 |
|
---|
| 487 | PB_FPF(stderr, "unknown pbuffer attribute: %s\n", token.c_str());
|
---|
| 488 | }
|
---|
| 489 |
|
---|
| 490 | if (m_iNComponents > 0)
|
---|
| 491 | {
|
---|
| 492 | pfAttribList->push_back(WGL_RED_BITS_ARB);
|
---|
| 493 | pfAttribList->push_back(m_iBitsPerComponent);
|
---|
| 494 | }
|
---|
| 495 | if (m_iNComponents > 1)
|
---|
| 496 | {
|
---|
| 497 | pfAttribList->push_back(WGL_GREEN_BITS_ARB);
|
---|
| 498 | pfAttribList->push_back(m_iBitsPerComponent);
|
---|
| 499 | }
|
---|
| 500 | if (m_iNComponents > 2)
|
---|
| 501 | {
|
---|
| 502 | pfAttribList->push_back(WGL_BLUE_BITS_ARB);
|
---|
| 503 | pfAttribList->push_back(m_iBitsPerComponent);
|
---|
| 504 | }
|
---|
| 505 | if (m_iNComponents > 3)
|
---|
| 506 | {
|
---|
| 507 | pfAttribList->push_back(WGL_ALPHA_BITS_ARB);
|
---|
| 508 | pfAttribList->push_back(m_iBitsPerComponent);
|
---|
| 509 | }
|
---|
| 510 | }
|
---|
| 511 |
|
---|
| 512 | // Check to see if the pbuffer was lost.
|
---|
| 513 | // If it was lost, destroy it and then recreate it.
|
---|
| 514 | void PBuffer::HandleModeSwitch()
|
---|
| 515 | {
|
---|
| 516 | int lost = 0;
|
---|
| 517 |
|
---|
| 518 | wglQueryPbufferARB(m_hPBuffer, WGL_PBUFFER_LOST_ARB, &lost);
|
---|
| 519 |
|
---|
| 520 | if (lost)
|
---|
| 521 | {
|
---|
| 522 | this->~PBuffer();
|
---|
| 523 | Initialize(m_iWidth, m_iHeight, m_bSharedContext, m_bShareObjects);
|
---|
| 524 | }
|
---|
| 525 | }
|
---|
| 526 |
|
---|
| 527 | int PBuffer::Bind(int iBuffer)
|
---|
| 528 | {
|
---|
| 529 | if (!m_bIsTexture)
|
---|
| 530 | {
|
---|
| 531 | PB_FPF(stderr, "PBuffer::Bind() failed - pbuffer format does not support render to texture!\n");
|
---|
| 532 | return 0;
|
---|
| 533 | }
|
---|
| 534 |
|
---|
| 535 | int ret = wglBindTexImageARB(m_hPBuffer, iBuffer);
|
---|
| 536 | if (!ret)
|
---|
| 537 | PB_FPF(stderr, "PBuffer::Bind() failed.\n");
|
---|
| 538 |
|
---|
| 539 | m_bIsBound = true;
|
---|
| 540 |
|
---|
| 541 | return ret;
|
---|
| 542 | }
|
---|
| 543 |
|
---|
| 544 | int PBuffer::Release(int iBuffer)
|
---|
| 545 | {
|
---|
| 546 | if (!m_bIsTexture)
|
---|
| 547 | {
|
---|
| 548 | PB_FPF(stderr, "PBuffer::Release() failed - pbuffer format does not support render to texture!\n");
|
---|
| 549 | return 0;
|
---|
| 550 | }
|
---|
| 551 |
|
---|
| 552 |
|
---|
| 553 |
|
---|
| 554 | int ret = wglReleaseTexImageARB(m_hPBuffer, iBuffer);
|
---|
| 555 | if (!ret)
|
---|
| 556 | PB_FPF(stderr, "PBuffer::Release() failed.\n");
|
---|
| 557 |
|
---|
| 558 | m_bIsBound = false;
|
---|
| 559 |
|
---|
| 560 | return ret;
|
---|
| 561 | }
|
---|
| 562 |
|
---|
| 563 |
|
---|
| 564 | void PBuffer::Activate(PBuffer *current /* = NULL */)
|
---|
| 565 | {
|
---|
| 566 | m_hOldGLRC = wglGetCurrentContext();
|
---|
| 567 | m_hOldDC = wglGetCurrentDC();
|
---|
| 568 |
|
---|
| 569 | /*
|
---|
| 570 | if (current == this)
|
---|
| 571 | {
|
---|
| 572 | return; // no switch necessary
|
---|
| 573 | }
|
---|
| 574 |
|
---|
| 575 | if (NULL == current || !current->m_bIsActive)
|
---|
| 576 | {
|
---|
| 577 | if (m_bIsActive)
|
---|
| 578 | return;
|
---|
| 579 |
|
---|
| 580 | m_hOldGLRC = wglGetCurrentContext();
|
---|
| 581 | m_hOldDC = wglGetCurrentDC();
|
---|
| 582 | }
|
---|
| 583 | else
|
---|
| 584 | {
|
---|
| 585 | m_hOldGLRC = current->m_hOldGLRC;
|
---|
| 586 | m_hOldDC = current->m_hOldDC;
|
---|
| 587 | current->m_hOldGLRC = 0;
|
---|
| 588 | current->m_hOldDC = 0;
|
---|
| 589 | current->m_bIsActive = false;
|
---|
| 590 | }*/
|
---|
| 591 |
|
---|
| 592 | if (!wglMakeCurrent(m_hDC, m_hGLRC))
|
---|
| 593 | PB_FPF(stderr, "PBuffer::Activate() failed.\n");
|
---|
| 594 |
|
---|
| 595 | m_bIsActive = true;
|
---|
| 596 | }
|
---|
| 597 |
|
---|
| 598 | void PBuffer::Deactivate()
|
---|
| 599 | {
|
---|
| 600 | /* if (!m_bIsActive)
|
---|
| 601 | return;
|
---|
| 602 | */
|
---|
| 603 | if (!wglMakeCurrent(m_hOldDC, m_hOldGLRC))
|
---|
| 604 | PB_FPF(stderr, "PBuffer::Deactivate() failed.\n");
|
---|
| 605 |
|
---|
| 606 | // m_hOldGLRC = 0;
|
---|
| 607 | // m_hOldDC = 0;
|
---|
| 608 |
|
---|
| 609 | m_bIsActive = false;
|
---|
| 610 | }
|
---|
| 611 |
|
---|
| 612 | #elif defined(UNIX)
|
---|
| 613 |
|
---|
| 614 | PBuffer::PBuffer(const char *strMode, bool managed)
|
---|
| 615 | : m_pDisplay(0), m_glxPbuffer(0), m_glxContext(0), m_pOldDisplay(0), m_glxOldDrawable(0),
|
---|
| 616 | m_glxOldContext(0), m_iWidth(0), m_iHeight(0), m_strMode(strMode),
|
---|
| 617 | m_bSharedContext(false), m_bShareObjects(false), m_bManaged(managed)
|
---|
| 618 | {
|
---|
| 619 | m_pfAttribList.push_back(GLX_DRAWABLE_TYPE);
|
---|
| 620 | m_pfAttribList.push_back(GLX_PBUFFER_BIT);
|
---|
| 621 | m_pfAttribList.push_back(GLX_RENDER_TYPE);
|
---|
| 622 | m_pfAttribList.push_back(GLX_RGBA_BIT);
|
---|
| 623 |
|
---|
| 624 | m_pbAttribList.push_back(GLX_LARGEST_PBUFFER);
|
---|
| 625 | m_pbAttribList.push_back(true);
|
---|
| 626 | m_pbAttribList.push_back(GLX_PRESERVED_CONTENTS);
|
---|
| 627 | m_pbAttribList.push_back(true);
|
---|
| 628 |
|
---|
| 629 | m_strMode = strMode;
|
---|
| 630 | parseModeString(m_strMode, &m_pfAttribList, &m_pbAttribList);
|
---|
| 631 |
|
---|
| 632 | m_pfAttribList.push_back(0);
|
---|
| 633 | m_pbAttribList.push_back(0);
|
---|
| 634 | }
|
---|
| 635 |
|
---|
| 636 | PBuffer::~PBuffer()
|
---|
| 637 | {
|
---|
| 638 | if (m_bManaged)
|
---|
| 639 | Destroy();
|
---|
| 640 | }
|
---|
| 641 |
|
---|
| 642 | bool PBuffer::Initialize(int iWidth, int iHeight, bool bShareContexts, bool bShareObjects)
|
---|
| 643 | {
|
---|
| 644 | Display *pDisplay = glXGetCurrentDisplay();
|
---|
| 645 | int iScreen = DefaultScreen(pDisplay);
|
---|
| 646 | GLXContext glxContext = glXGetCurrentContext();
|
---|
| 647 |
|
---|
| 648 | GLXFBConfig *glxConfig;
|
---|
| 649 | int iConfigCount;
|
---|
| 650 |
|
---|
| 651 | m_bSharedContext = bShareContexts;
|
---|
| 652 | m_bShareObjects = bShareObjects;
|
---|
| 653 |
|
---|
| 654 | m_iWidth = iWidth;
|
---|
| 655 | m_iHeight = iHeight;
|
---|
| 656 |
|
---|
| 657 | if (m_bSharedContext)
|
---|
| 658 | {
|
---|
| 659 | glxConfig = glXGetFBConfigs(pDisplay, iScreen, &iConfigCount);
|
---|
| 660 | if (!glxConfig)
|
---|
| 661 | {
|
---|
| 662 | PB_FPF(stderr, "pbuffer creation error: glXGetFBConfigs() failed\n");
|
---|
| 663 | return false;
|
---|
| 664 | }
|
---|
| 665 | }
|
---|
| 666 | else
|
---|
| 667 | {
|
---|
| 668 | glxConfig = glXChooseFBConfigSGIX(pDisplay, iScreen, &m_pfAttribList[0], &iConfigCount);
|
---|
| 669 | if (!glxConfig)
|
---|
| 670 | {
|
---|
| 671 | PB_FPF(stderr, "pbuffer creation error: glXChooseFBConfig() failed\n");
|
---|
| 672 | return false;
|
---|
| 673 | }
|
---|
| 674 | }
|
---|
| 675 |
|
---|
| 676 | m_glxPbuffer = glXCreateGLXPbufferSGIX(pDisplay, glxConfig[0], m_iWidth, m_iHeight, &m_pbAttribList[0]);
|
---|
| 677 |
|
---|
| 678 | if (!m_glxPbuffer)
|
---|
| 679 | {
|
---|
| 680 | PB_FPF(stderr, "pbuffer creation error: glXCreatePbuffer() failed\n");
|
---|
| 681 | return false;
|
---|
| 682 | }
|
---|
| 683 |
|
---|
| 684 | if (m_bSharedContext)
|
---|
| 685 | {
|
---|
| 686 | m_glxContext = glxContext;
|
---|
| 687 | }
|
---|
| 688 | else
|
---|
| 689 | {
|
---|
| 690 | if (m_bShareObjects)
|
---|
| 691 | m_glxContext = glXCreateContextWithConfigSGIX(pDisplay, glxConfig[0], GLX_RGBA_TYPE, glxContext, true);
|
---|
| 692 | else
|
---|
| 693 | m_glxContext = glXCreateContextWithConfigSGIX(pDisplay, glxConfig[0], GLX_RGBA_TYPE, NULL, true);
|
---|
| 694 |
|
---|
| 695 | if (!glxConfig)
|
---|
| 696 | {
|
---|
| 697 | PB_FPF(stderr, "pbuffer creation error: glXCreateNewContext() failed\n");
|
---|
| 698 | return false;
|
---|
| 699 | }
|
---|
| 700 | }
|
---|
| 701 |
|
---|
| 702 | m_pDisplay = pDisplay;
|
---|
| 703 |
|
---|
| 704 | unsigned int w, h;
|
---|
| 705 | w = h = 0;
|
---|
| 706 |
|
---|
| 707 | glXQueryGLXPbufferSGIX(m_pDisplay, m_glxPbuffer, GLX_WIDTH, &w);
|
---|
| 708 | glXQueryGLXPbufferSGIX(m_pDisplay, m_glxPbuffer, GLX_HEIGHT, &h);
|
---|
| 709 | m_iWidth = w;
|
---|
| 710 | m_iHeight = h;
|
---|
| 711 |
|
---|
| 712 | PB_FPF(stdout, "Created a %d x %d pbuffer\n", m_iWidth, m_iHeight);
|
---|
| 713 |
|
---|
| 714 | return true;
|
---|
| 715 | }
|
---|
| 716 |
|
---|
| 717 | void PBuffer::Destroy()
|
---|
| 718 | {
|
---|
| 719 | if (m_glxContext && !m_bSharedContext)
|
---|
| 720 | glXDestroyContext(m_pDisplay, m_glxContext);
|
---|
| 721 |
|
---|
| 722 | if (m_glxPbuffer)
|
---|
| 723 | glXDestroyGLXPbufferSGIX(m_pDisplay, m_glxPbuffer);
|
---|
| 724 |
|
---|
| 725 | m_glxContext = 0;
|
---|
| 726 | m_glxPbuffer = 0;
|
---|
| 727 | m_pDisplay = 0;
|
---|
| 728 | }
|
---|
| 729 |
|
---|
| 730 | void PBuffer::parseModeString(const char *modeString, vector<int> *pfAttribList, vector<int> *pbAttribList)
|
---|
| 731 | {
|
---|
| 732 | if (!modeString || strcmp(modeString, "") == 0)
|
---|
| 733 | return;
|
---|
| 734 |
|
---|
| 735 | m_iBitsPerComponent = 8;
|
---|
| 736 | m_iNComponents = 0;
|
---|
| 737 | bool bIsFloatBuffer = false;
|
---|
| 738 | bool bNeedAlpha = false;
|
---|
| 739 |
|
---|
| 740 | char *mode = strdup(modeString);
|
---|
| 741 |
|
---|
| 742 | vector<string> tokens;
|
---|
| 743 | char *buf = strtok(mode, " ");
|
---|
| 744 | while (buf != NULL)
|
---|
| 745 | {
|
---|
| 746 | if (strstr(buf, "float") != NULL)
|
---|
| 747 | bIsFloatBuffer = true;
|
---|
| 748 |
|
---|
| 749 | if (strstr(buf, "alpha") != NULL)
|
---|
| 750 | bNeedAlpha = true;
|
---|
| 751 |
|
---|
| 752 | tokens.push_back(buf);
|
---|
| 753 | buf = strtok(NULL, " ");
|
---|
| 754 | }
|
---|
| 755 |
|
---|
| 756 | for (unsigned int i = 0; i < tokens.size(); i++)
|
---|
| 757 | {
|
---|
| 758 | string token = tokens[i];
|
---|
| 759 |
|
---|
| 760 | if (token == "rgb" && !bIsFloatBuffer)
|
---|
| 761 | {
|
---|
| 762 | pfAttribList->push_back(GLX_RED_SIZE);
|
---|
| 763 | pfAttribList->push_back(m_iBitsPerComponent);
|
---|
| 764 | pfAttribList->push_back(GLX_GREEN_SIZE);
|
---|
| 765 | pfAttribList->push_back(m_iBitsPerComponent);
|
---|
| 766 | pfAttribList->push_back(GLX_BLUE_SIZE);
|
---|
| 767 | pfAttribList->push_back(m_iBitsPerComponent);
|
---|
| 768 | m_iNComponents += 3;
|
---|
| 769 | continue;
|
---|
| 770 | }
|
---|
| 771 | else if (token == "rgb") PB_FPF(stderr, "warning : mistake in components definition (rgb + %d)\n", m_iNComponents);
|
---|
| 772 |
|
---|
| 773 | if (token == "rgba" && (m_iNComponents == 0))
|
---|
| 774 | {
|
---|
| 775 | pfAttribList->push_back(GLX_RED_SIZE);
|
---|
| 776 | pfAttribList->push_back(m_iBitsPerComponent);
|
---|
| 777 | pfAttribList->push_back(GLX_GREEN_SIZE);
|
---|
| 778 | pfAttribList->push_back(m_iBitsPerComponent);
|
---|
| 779 | pfAttribList->push_back(GLX_BLUE_SIZE);
|
---|
| 780 | pfAttribList->push_back(m_iBitsPerComponent);
|
---|
| 781 | pfAttribList->push_back(GLX_ALPHA_SIZE);
|
---|
| 782 | pfAttribList->push_back(m_iBitsPerComponent);
|
---|
| 783 | m_iNComponents = 4;
|
---|
| 784 | continue;
|
---|
| 785 | }
|
---|
| 786 | else if (token == "rgba") PB_FPF(stderr, "warning : mistake in components definition (rgba + %d)\n", m_iNComponents);
|
---|
| 787 |
|
---|
| 788 | if (token.find("alpha") != token.npos)
|
---|
| 789 | {
|
---|
| 790 | pfAttribList->push_back(GLX_ALPHA_SIZE);
|
---|
| 791 | pfAttribList->push_back(m_iBitsPerComponent);
|
---|
| 792 | m_iNComponents++;
|
---|
| 793 | continue;
|
---|
| 794 | }
|
---|
| 795 | else if (token == "alpha") PB_FPF(stderr, "warning : mistake in components definition (alpha + %d)\n", m_iNComponents);
|
---|
| 796 |
|
---|
| 797 | if (token.find("depth") != token.npos)
|
---|
| 798 | {
|
---|
| 799 | pfAttribList->push_back(GLX_DEPTH_SIZE);
|
---|
| 800 | pfAttribList->push_back(getIntegerValue(token));
|
---|
| 801 |
|
---|
| 802 | continue;
|
---|
| 803 | }
|
---|
| 804 |
|
---|
| 805 | if (token.find("stencil") != token.npos)
|
---|
| 806 | {
|
---|
| 807 | pfAttribList->push_back(GLX_STENCIL_SIZE);
|
---|
| 808 | pfAttribList->push_back(getIntegerValue(token));
|
---|
| 809 |
|
---|
| 810 | continue;
|
---|
| 811 | }
|
---|
| 812 |
|
---|
| 813 | if (token.find("samples") != token.npos)
|
---|
| 814 | {
|
---|
| 815 | pfAttribList->push_back(GLX_SAMPLE_BUFFERS_ARB);
|
---|
| 816 | pfAttribList->push_back(1);
|
---|
| 817 | pfAttribList->push_back(GLX_SAMPLES_ARB);
|
---|
| 818 | pfAttribList->push_back(getIntegerValue(token));
|
---|
| 819 |
|
---|
| 820 | continue;
|
---|
| 821 | }
|
---|
| 822 |
|
---|
| 823 | if (token == "double")
|
---|
| 824 | {
|
---|
| 825 | pfAttribList->push_back(GLX_DOUBLEBUFFER);
|
---|
| 826 | pfAttribList->push_back(true);
|
---|
| 827 |
|
---|
| 828 | continue;
|
---|
| 829 | }
|
---|
| 830 |
|
---|
| 831 | if (token.find("float") == 0)
|
---|
| 832 | {
|
---|
| 833 | m_iBitsPerComponent = getIntegerValue(token);
|
---|
| 834 | //bIsFloatBuffer = true; done previously
|
---|
| 835 | pfAttribList->push_back(GLX_FLOAT_COMPONENTS_NV);
|
---|
| 836 | pfAttribList->push_back(true);
|
---|
| 837 | continue;
|
---|
| 838 | }
|
---|
| 839 |
|
---|
| 840 | PB_FPF(stderr, "unknown pbuffer attribute: %s\n", token.c_str());
|
---|
| 841 | }
|
---|
| 842 | }
|
---|
| 843 |
|
---|
| 844 | void PBuffer::Activate(PBuffer *current /* = NULL */)
|
---|
| 845 | {
|
---|
| 846 | if (current == this)
|
---|
| 847 | {
|
---|
| 848 | return; // no switch necessary
|
---|
| 849 | }
|
---|
| 850 |
|
---|
| 851 | if (NULL == current || !current->m_bIsActive)
|
---|
| 852 | {
|
---|
| 853 | m_pOldDisplay = glXGetCurrentDisplay();
|
---|
| 854 | m_glxOldDrawable = glXGetCurrentDrawable();
|
---|
| 855 | m_glxOldContext = glXGetCurrentContext();
|
---|
| 856 | }
|
---|
| 857 | else
|
---|
| 858 | {
|
---|
| 859 | m_pOldDisplay = current->m_pOldDisplay;
|
---|
| 860 | m_glxOldDrawable = current->m_glxOldDrawable;
|
---|
| 861 | m_glxOldContext = current->m_glxOldContext;
|
---|
| 862 | current->m_pOldDisplay = 0;
|
---|
| 863 | current->m_glxOldDrawable = 0;
|
---|
| 864 | current->m_glxOldContext = 0;
|
---|
| 865 | }
|
---|
| 866 |
|
---|
| 867 | if (!glXMakeCurrent(m_pDisplay, m_glxPbuffer, m_glxContext))
|
---|
| 868 | PB_FPF(stderr, "PBuffer::Activate() failed.\n");
|
---|
| 869 | }
|
---|
| 870 |
|
---|
| 871 | void PBuffer::Deactivate()
|
---|
| 872 | {
|
---|
| 873 | if (!glXMakeCurrent(m_pOldDisplay, m_glxOldDrawable, m_glxOldContext))
|
---|
| 874 | PB_FPF(stderr, "PBuffer::Deactivate() failed.\n");
|
---|
| 875 |
|
---|
| 876 | m_pOldDisplay = 0;
|
---|
| 877 | m_glxOldDrawable = 0;
|
---|
| 878 | m_glxOldContext = 0;
|
---|
| 879 | }
|
---|
| 880 |
|
---|
| 881 | #elif defined(MACOS)
|
---|
| 882 |
|
---|
| 883 | PBuffer::PBuffer(const char *strMode)
|
---|
| 884 | :
|
---|
| 885 | m_iWidth(0), m_iHeight(0), m_strMode(strMode),
|
---|
| 886 | m_bSharedContext(false), m_bShareObjects(false)
|
---|
| 887 | {
|
---|
| 888 | PB_FPF(stderr, "pbuffer not implemented under Mac OS X yet\n");
|
---|
| 889 | }
|
---|
| 890 |
|
---|
| 891 | PBuffer::~PBuffer()
|
---|
| 892 | {
|
---|
| 893 | PB_FPF(stderr, "pbuffer not implemented under Mac OS X yet\n");
|
---|
| 894 | }
|
---|
| 895 |
|
---|
| 896 | bool PBuffer::Initialize(int iWidth, int iHeight, bool bShareContexts, bool bShareObjects)
|
---|
| 897 | {
|
---|
| 898 | PB_FPF(stderr, "pbuffer not implemented under Mac OS X yet\n");
|
---|
| 899 |
|
---|
| 900 | return false;
|
---|
| 901 | }
|
---|
| 902 |
|
---|
| 903 | void PBuffer::Activate()
|
---|
| 904 | {
|
---|
| 905 | PB_FPF(stderr, "pbuffer not implemented under Mac OS X yet\n");
|
---|
| 906 | }
|
---|
| 907 |
|
---|
| 908 | void PBuffer::Deactivate()
|
---|
| 909 | {
|
---|
| 910 | PB_FPF(stderr, "pbuffer not implemented under Mac OS X yet\n");
|
---|
| 911 | }
|
---|
| 912 |
|
---|
| 913 | #endif
|
---|
| 914 |
|
---|
| 915 | string PBuffer::getStringValue(string token)
|
---|
| 916 | {
|
---|
| 917 | size_t pos;
|
---|
| 918 | if ((pos = token.find("=")) != token.npos)
|
---|
| 919 | {
|
---|
| 920 | string value = token.substr(pos+1, token.length()-pos+1);
|
---|
| 921 | return value;
|
---|
| 922 | }
|
---|
| 923 | else
|
---|
| 924 | return "";
|
---|
| 925 | }
|
---|
| 926 |
|
---|
| 927 | int PBuffer::getIntegerValue(string token)
|
---|
| 928 | {
|
---|
| 929 | size_t pos;
|
---|
| 930 | if ((pos = token.find("=")) != token.npos)
|
---|
| 931 | {
|
---|
| 932 | string value = token.substr(pos+1, token.length()-pos+1);
|
---|
| 933 | if (value.empty())
|
---|
| 934 | return 1;
|
---|
| 935 | return atoi(value.c_str());
|
---|
| 936 | }
|
---|
| 937 | else
|
---|
| 938 | return 1;
|
---|
| 939 | }
|
---|
| 940 |
|
---|
| 941 | //----------------------------------------------------------------------------------
|
---|
| 942 | //
|
---|
| 943 | /// return the total size in bytes of the PBuffer
|
---|
| 944 | //
|
---|
| 945 | //----------------------------------------------------------------------------------
|
---|
| 946 | unsigned int PBuffer::GetSizeInBytes()
|
---|
| 947 | {
|
---|
| 948 | return m_iWidth * m_iHeight * (m_iNComponents/8);
|
---|
| 949 | }
|
---|
| 950 | /*************************************************************************/ /**
|
---|
| 951 |
|
---|
| 952 | make a copy the entire PBuffer in the memory. You have to allocate this area (ptr).
|
---|
| 953 | if ever you want to read a smaller size : specify it through w,h. otherwise w=h=-1
|
---|
| 954 |
|
---|
| 955 | */ /*********************************************************************/
|
---|
| 956 | unsigned int PBuffer::CopyToBuffer(void *ptr, int w, int h)
|
---|
| 957 | {
|
---|
| 958 | GLenum format;
|
---|
| 959 | GLenum type;
|
---|
| 960 | switch(m_iNComponents)
|
---|
| 961 | {
|
---|
| 962 | case 1: //
|
---|
| 963 | format = GL_LUMINANCE; // is it right to ask for Red only component ?
|
---|
| 964 | break;
|
---|
| 965 | case 2:
|
---|
| 966 | format = GL_LUMINANCE_ALPHA; //How to ask for GL_RG ??
|
---|
| 967 | break;
|
---|
| 968 | case 3:
|
---|
| 969 | format = GL_RGB;
|
---|
| 970 | break;
|
---|
| 971 | case 4:
|
---|
| 972 | format = GL_RGBA;
|
---|
| 973 | break;
|
---|
| 974 | }
|
---|
| 975 | switch(m_iBitsPerComponent)
|
---|
| 976 | {
|
---|
| 977 | case 8:
|
---|
| 978 | type = GL_UNSIGNED_BYTE;
|
---|
| 979 | break;
|
---|
| 980 | case 32:
|
---|
| 981 | type = GL_FLOAT;
|
---|
| 982 | break;
|
---|
| 983 | #ifdef GL_NV_half_float
|
---|
| 984 | case 16:
|
---|
| 985 | type = GL_HALF_FLOAT_NV;
|
---|
| 986 | break;
|
---|
| 987 | #endif
|
---|
| 988 | default:
|
---|
| 989 | PB_FPF(stderr, "unknown m_iBitsPerComponent\n");
|
---|
| 990 | # if defined(WIN32)
|
---|
| 991 | _asm { int 3 }
|
---|
| 992 | # endif
|
---|
| 993 | }
|
---|
| 994 | Activate();
|
---|
| 995 | if((w < 0) || (w > m_iWidth))
|
---|
| 996 | w = m_iWidth;
|
---|
| 997 | if((h < 0) || (h > m_iHeight))
|
---|
| 998 | h = m_iHeight;
|
---|
| 999 | glReadPixels(0,0,w,h, format, type, ptr);
|
---|
| 1000 | Deactivate();
|
---|
| 1001 | return w * h * (m_iNComponents/8);
|
---|
| 1002 | }
|
---|
| 1003 |
|
---|