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-rw-r--r--xorg-server/hw/xwin/glx/simpledib.c675
1 files changed, 675 insertions, 0 deletions
diff --git a/xorg-server/hw/xwin/glx/simpledib.c b/xorg-server/hw/xwin/glx/simpledib.c
new file mode 100644
index 000000000..f491e2857
--- /dev/null
+++ b/xorg-server/hw/xwin/glx/simpledib.c
@@ -0,0 +1,675 @@
+/*
+** Simple example of rendering to a Windows DIB (Device Independent Bitmap)
+*/
+#include <windows.h>
+#include <math.h>
+#include <GL/gl.h>
+
+#if !defined(M_PI)
+#define M_PI 3.14159265F
+#endif
+
+char *className = "OpenGL";
+char *windowName = "Simple DIB Example";
+int winX = 0, winY = 0;
+int winWidth = 1024, winHeight = 1024;
+
+HDC hDC;
+HDC hDCFrontBuffer;
+HGLRC hGLRC;
+HPALETTE hPalette;
+HBITMAP hBitmap, hOldBitmap;
+
+void (*idleFunc)(void);
+
+BOOL colorIndexMode = FALSE;
+BOOL doubleBuffered = FALSE;
+BOOL renderToDIB = TRUE;
+
+/* Struct used to manage color ramps */
+struct colorIndexState {
+ GLfloat amb[3]; /* ambient color / bottom of ramp */
+ GLfloat diff[3]; /* diffuse color / middle of ramp */
+ GLfloat spec[3]; /* specular color / top of ramp */
+ GLfloat ratio; /* ratio of diffuse to specular in ramp */
+ GLint indexes[3]; /* where ramp was placed in palette */
+};
+
+/*
+** Each entry in this array corresponds to a color ramp in the
+** palette. The indexes member of each struct is updated to
+** reflect the placement of the color ramp in the palette.
+*/
+#define NUM_COLORS (sizeof(colors) / sizeof(colors[0]))
+struct colorIndexState colors[] = {
+ {
+ { 0.0F, 0.0F, 0.0F },
+ { 0.1F, 0.6F, 0.3F },
+ { 1.0F, 1.0F, 1.0F },
+ 0.75F, { 0, 0, 0 },
+ },
+ {
+ { 0.0F, 0.0F, 0.0F },
+ { 0.0F, 0.2F, 0.5F },
+ { 1.0F, 1.0F, 1.0F },
+
+ 0.75F, { 0, 0, 0 },
+ },
+ {
+ { 0.0F, 0.05F, 0.05F },
+ { 0.6F, 0.0F, 0.8F },
+ { 1.0F, 1.0F, 1.0F },
+ 0.75F, { 0, 0, 0 },
+ },
+};
+
+void
+drawTorus(void)
+{
+ int numMajor = 32;
+ int numMinor = 24;
+ float majorRadius = 0.6F;
+ float minorRadius = 0.2F;
+ double majorStep = 2.0F*M_PI / numMajor;
+ double minorStep = 2.0F*M_PI / numMinor;
+ int i, j;
+
+ for (i=0; i<numMajor; ++i) {
+ double a0 = i * majorStep;
+ double a1 = a0 + majorStep;
+ GLfloat x0 = (GLfloat) cos(a0);
+ GLfloat y0 = (GLfloat) sin(a0);
+ GLfloat x1 = (GLfloat) cos(a1);
+ GLfloat y1 = (GLfloat) sin(a1);
+
+ if (i & 1) {
+ glColor3fv(colors[0].diff);
+ glMaterialiv(GL_FRONT, GL_COLOR_INDEXES, colors[0].indexes);
+ } else {
+ glColor3fv(colors[1].diff);
+ glMaterialiv(GL_FRONT, GL_COLOR_INDEXES, colors[1].indexes);
+ }
+
+ glBegin(GL_TRIANGLE_STRIP);
+ for (j=0; j<=numMinor; ++j) {
+ double b = j * minorStep;
+ GLfloat c = (GLfloat) cos(b);
+ GLfloat r = minorRadius * c + majorRadius;
+ GLfloat z = minorRadius * (GLfloat) sin(b);
+
+ glNormal3f(x0*c, y0*c, z/minorRadius);
+ glVertex3f(x0*r, y0*r, z);
+
+ glNormal3f(x1*c, y1*c, z/minorRadius);
+ glVertex3f(x1*r, y1*r, z);
+ }
+ glEnd();
+ }
+}
+
+/*****************************************************************/
+
+void
+setProjection(void)
+{
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ /*
+ ** Preserve the aspect ratio of objects in the scene.
+ */
+ if (winWidth > winHeight) {
+ GLfloat aspect = (GLfloat) winWidth / (GLfloat) winHeight;
+ glFrustum(-0.5F*aspect, 0.5F*aspect, -0.5F, 0.5F, 1.0F, 3.0F);
+ } else {
+ GLfloat aspect = (GLfloat) winHeight / (GLfloat) winWidth;
+ glFrustum(-0.5F, 0.5F, -0.5F*aspect, 0.5F*aspect, 1.0F, 3.0F);
+ }
+ glMatrixMode(GL_MODELVIEW);
+}
+
+void
+init(void)
+{
+ GLfloat matShine = 20.00F;
+ GLfloat light0Pos[4] = { 0.70F, 0.70F, 1.25F, 0.00F };
+
+ glClearColor(colors[2].diff[0], colors[2].diff[1], colors[2].diff[2], 1.0F);
+ glClearIndex((GLfloat) colors[2].indexes[1]);
+
+ setProjection();
+ glTranslatef(0.0F, 0.0F, -2.0F);
+
+ glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, matShine);
+ glLightfv(GL_LIGHT0, GL_POSITION, light0Pos);
+ glEnable(GL_LIGHT0);
+
+ glEnable(GL_LIGHTING);
+ glEnable(GL_DEPTH_TEST);
+
+ if (!colorIndexMode) {
+ glEnable(GL_COLOR_MATERIAL);
+ }
+}
+
+void
+doRedraw(void)
+{
+ static GLfloat x, y, z;
+
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+ glPushMatrix();
+ glRotatef(x, 1.0F, 0.0F, 0.0F);
+ glRotatef(y, 0.0F, 1.0F, 0.0F);
+ glRotatef(z, 0.0F, 0.0F, 1.0F);
+
+ drawTorus();
+
+ glPopMatrix();
+
+ if (renderToDIB) {
+ glFinish();
+ BitBlt(hDCFrontBuffer, /*winWidth/4, winHeight/4, winWidth/2, winHeight/2,*/0,0,winWidth, winHeight, hDC, 0, 0, SRCCOPY);
+ GdiFlush();
+ } else {
+ SwapBuffers(hDC);
+ }
+
+ x += 5.0F;
+ if (x > 360.0F) x -= 360.0F;
+ y += 7.0F;
+ if (y > 360.0F) y -= 360.0F;
+ z += 9.0F;
+ if (z > 360.0F) z -= 360.0F;
+}
+
+void
+redraw(void)
+{
+ idleFunc = doRedraw;
+}
+
+void
+resize(void)
+{
+ setProjection();
+ glViewport(0, 0, winWidth, winHeight /*winWidth/2, winHeight/2*/);
+}
+
+/*****************************************************************/
+
+void
+setupDIB(HDC hDC)
+{
+ BITMAPINFO *bmInfo;
+ BITMAPINFOHEADER *bmHeader;
+ UINT usage;
+ VOID *base;
+ int bmiSize;
+ int bitsPerPixel;
+
+ bmiSize = sizeof(*bmInfo);
+ bitsPerPixel = GetDeviceCaps(hDC, BITSPIXEL);
+
+ switch (bitsPerPixel) {
+ case 8:
+ /* bmiColors is 256 WORD palette indices */
+ bmiSize += (256 * sizeof(WORD)) - sizeof(RGBQUAD);
+ break;
+ case 16:
+ /* bmiColors is 3 WORD component masks */
+ bmiSize += (3 * sizeof(DWORD)) - sizeof(RGBQUAD);
+ break;
+ case 24:
+ case 32:
+ default:
+ /* bmiColors not used */
+ break;
+ }
+
+ bmInfo = (BITMAPINFO *) calloc(1, bmiSize);
+ bmHeader = &bmInfo->bmiHeader;
+
+ bmHeader->biSize = sizeof(*bmHeader);
+ bmHeader->biWidth = winWidth /* /2 */;
+ bmHeader->biHeight = winHeight /* /2 */;
+ bmHeader->biPlanes = 1; /* must be 1 */
+ bmHeader->biBitCount = bitsPerPixel;
+ bmHeader->biXPelsPerMeter = 0;
+ bmHeader->biYPelsPerMeter = 0;
+ bmHeader->biClrUsed = 0; /* all are used */
+ bmHeader->biClrImportant = 0; /* all are important */
+
+ switch (bitsPerPixel) {
+ case 8:
+ bmHeader->biCompression = BI_RGB;
+ bmHeader->biSizeImage = 0;
+ usage = DIB_PAL_COLORS;
+ /* bmiColors is 256 WORD palette indices */
+ {
+ WORD *palIndex = (WORD *) &bmInfo->bmiColors[0];
+ int i;
+
+ for (i=0; i<256; i++) {
+ palIndex[i] = i;
+ }
+ }
+ break;
+ case 16:
+ bmHeader->biCompression = BI_RGB;
+ bmHeader->biSizeImage = 0;
+ usage = DIB_RGB_COLORS;
+ /* bmiColors is 3 WORD component masks */
+ {
+ DWORD *compMask = (DWORD *) &bmInfo->bmiColors[0];
+
+ compMask[0] = 0xF800;
+ compMask[1] = 0x07E0;
+ compMask[2] = 0x001F;
+ }
+ break;
+ case 24:
+ case 32:
+ default:
+ bmHeader->biCompression = BI_RGB;
+ bmHeader->biSizeImage = 0;
+ usage = DIB_RGB_COLORS;
+ /* bmiColors not used */
+ break;
+ }
+
+ hBitmap = CreateDIBSection(hDC, bmInfo, usage, &base, NULL, 0);
+ if (hBitmap == NULL) {
+ (void) MessageBox(WindowFromDC(hDC),
+ "Failed to create DIBSection.",
+ "OpenGL application error",
+ MB_ICONERROR | MB_OK);
+ exit(1);
+ }
+
+ hOldBitmap = SelectObject(hDC, hBitmap);
+
+ free(bmInfo);
+}
+
+void
+resizeDIB(HDC hDC)
+{
+ SelectObject(hDC, hOldBitmap);
+ DeleteObject(hBitmap);
+ setupDIB(hDC);
+}
+
+void
+setupPalette(HDC hDC)
+{
+ PIXELFORMATDESCRIPTOR pfd;
+ LOGPALETTE* pPal;
+ int pixelFormat = GetPixelFormat(hDC);
+ int paletteSize;
+
+ DescribePixelFormat(hDC, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
+
+ /*
+ ** Determine if a palette is needed and if so what size.
+ */
+ if (pfd.dwFlags & PFD_NEED_PALETTE) {
+ paletteSize = 1 << pfd.cColorBits;
+ } else if (pfd.iPixelType == PFD_TYPE_COLORINDEX) {
+ paletteSize = 4096;
+ } else {
+ return;
+ }
+
+ pPal = (LOGPALETTE*)
+ malloc(sizeof(LOGPALETTE) + paletteSize * sizeof(PALETTEENTRY));
+ pPal->palVersion = 0x300;
+ pPal->palNumEntries = paletteSize;
+
+ if (pfd.iPixelType == PFD_TYPE_RGBA) {
+ /*
+ ** Fill the logical paletee with RGB color ramps
+ */
+ int redMask = (1 << pfd.cRedBits) - 1;
+ int greenMask = (1 << pfd.cGreenBits) - 1;
+ int blueMask = (1 << pfd.cBlueBits) - 1;
+ int i;
+
+ for (i=0; i<paletteSize; ++i) {
+ pPal->palPalEntry[i].peRed =
+ (((i >> pfd.cRedShift) & redMask) * 255) / redMask;
+ pPal->palPalEntry[i].peGreen =
+ (((i >> pfd.cGreenShift) & greenMask) * 255) / greenMask;
+ pPal->palPalEntry[i].peBlue =
+ (((i >> pfd.cBlueShift) & blueMask) * 255) / blueMask;
+ pPal->palPalEntry[i].peFlags = 0;
+ }
+ } else {
+ /*
+ ** Fill the logical palette with color ramps.
+ **
+ ** Set up the logical palette so that it can be realized
+ ** into the system palette as an identity palette.
+ **
+ ** 1) The default static entries should be present and at the right
+ ** location. The easiest way to do this is to grab them from
+ ** the current system palette.
+ **
+ ** 2) All non-static entries should be initialized to unique values.
+ ** The easiest way to do this is to ensure that all of the non-static
+ ** entries have the PC_NOCOLLAPSE flag bit set.
+ */
+ int numRamps = NUM_COLORS;
+ int rampSize = (paletteSize - 20) / numRamps;
+ int extra = (paletteSize - 20) - (numRamps * rampSize);
+ int i, r;
+
+ /*
+ ** Initialize static entries by copying them from the
+ ** current system palette.
+ */
+ GetSystemPaletteEntries(hDC, 0, paletteSize, &pPal->palPalEntry[0]);
+
+ /*
+ ** Fill in non-static entries with desired colors.
+ */
+ for (r=0; r<numRamps; ++r) {
+ int rampBase = r * rampSize + 10;
+ PALETTEENTRY *pe = &pPal->palPalEntry[rampBase];
+ int diffSize = (int) (rampSize * colors[r].ratio);
+ int specSize = rampSize - diffSize;
+
+ for (i=0; i<rampSize; ++i) {
+ GLfloat *c0, *c1;
+ GLint a;
+
+ if (i < diffSize) {
+ c0 = colors[r].amb;
+ c1 = colors[r].diff;
+ a = (i * 255) / (diffSize - 1);
+ } else {
+ c0 = colors[r].diff;
+ c1 = colors[r].spec;
+ a = ((i - diffSize) * 255) / (specSize - 1);
+ }
+
+ pe[i].peRed = (BYTE) (a * (c1[0] - c0[0]) + 255 * c0[0]);
+ pe[i].peGreen = (BYTE) (a * (c1[1] - c0[1]) + 255 * c0[1]);
+ pe[i].peBlue = (BYTE) (a * (c1[2] - c0[2]) + 255 * c0[2]);
+ pe[i].peFlags = PC_NOCOLLAPSE;
+ }
+
+ colors[r].indexes[0] = rampBase;
+ colors[r].indexes[1] = rampBase + (diffSize-1);
+ colors[r].indexes[2] = rampBase + (rampSize-1);
+ }
+
+ /*
+ ** Initialize any remaining non-static entries.
+ */
+ for (i=0; i<extra; ++i) {
+ int index = numRamps*rampSize+10+i;
+ PALETTEENTRY *pe = &pPal->palPalEntry[index];
+
+ pe->peRed = (BYTE) 0;
+ pe->peGreen = (BYTE) 0;
+ pe->peBlue = (BYTE) 0;
+ pe->peFlags = PC_NOCOLLAPSE;
+ }
+ }
+
+ hPalette = CreatePalette(pPal);
+ free(pPal);
+
+ if (hPalette) {
+ SelectPalette(hDC, hPalette, FALSE);
+ RealizePalette(hDC);
+ }
+}
+
+void
+setupPixelFormat(HDC hDC)
+{
+ PIXELFORMATDESCRIPTOR pfd = {
+ sizeof(PIXELFORMATDESCRIPTOR), /* size of this pfd */
+ 1, /* version num */
+ PFD_SUPPORT_OPENGL, /* support OpenGL */
+ 0, /* pixel type */
+ 0, /* 8-bit color depth */
+ 0, 0, 0, 0, 0, 0, /* color bits (ignored) */
+ 0, /* no alpha buffer */
+ 0, /* alpha bits (ignored) */
+ 0, /* no accumulation buffer */
+ 0, 0, 0, 0, /* accum bits (ignored) */
+ 16, /* depth buffer */
+ 0, /* no stencil buffer */
+ 0, /* no auxiliary buffers */
+ PFD_MAIN_PLANE, /* main layer */
+ 0, /* reserved */
+ 0, 0, 0, /* no layer, visible, damage masks */
+ };
+ int SelectedPixelFormat;
+ BOOL retVal;
+
+ pfd.cColorBits = GetDeviceCaps(hDC, BITSPIXEL);
+
+ if (colorIndexMode) {
+ pfd.iPixelType = PFD_TYPE_COLORINDEX;
+ } else {
+ pfd.iPixelType = PFD_TYPE_RGBA;
+ }
+
+ if (doubleBuffered) {
+ pfd.dwFlags |= PFD_DOUBLEBUFFER;
+ }
+
+ if (renderToDIB) {
+ pfd.dwFlags |= PFD_DRAW_TO_BITMAP;
+ } else {
+ pfd.dwFlags |= PFD_DRAW_TO_WINDOW;
+ }
+
+ SelectedPixelFormat = ChoosePixelFormat(hDC, &pfd);
+ if (SelectedPixelFormat == 0) {
+ (void) MessageBox(WindowFromDC(hDC),
+ "Failed to find acceptable pixel format.",
+ "OpenGL application error",
+ MB_ICONERROR | MB_OK);
+ exit(1);
+ }
+
+ retVal = SetPixelFormat(hDC, SelectedPixelFormat, &pfd);
+ if (retVal != TRUE) {
+ (void) MessageBox(WindowFromDC(hDC),
+ "Failed to set pixel format.",
+ "OpenGL application error",
+ MB_ICONERROR | MB_OK);
+ exit(1);
+ }
+}
+
+LRESULT APIENTRY
+WndProc(
+ HWND hWnd,
+ UINT message,
+ WPARAM wParam,
+ LPARAM lParam)
+{
+ switch (message) {
+ case WM_CREATE:
+ return 0;
+ case WM_DESTROY:
+ PostQuitMessage(0);
+ return 0;
+ case WM_SIZE:
+ if (hGLRC) {
+ winWidth = (int) LOWORD(lParam);
+ winHeight = (int) HIWORD(lParam);
+ /**/
+ if (renderToDIB) {
+ resizeDIB(hDC);
+ }
+ /**/
+ resize();
+ return 0;
+ }
+ case WM_PALETTECHANGED:
+ /*
+ ** Update palette mapping if this *is not* the active window.
+ */
+ if (hGLRC && hPalette && (HWND) wParam != hWnd) {
+ UnrealizeObject(hPalette);
+ SelectPalette(hDC, hPalette, FALSE);
+ RealizePalette(hDC);
+ redraw();
+ return 0;
+ }
+ break;
+ case WM_QUERYNEWPALETTE:
+ /*
+ ** Update palette mapping if this *is* the active window.
+ */
+ if (hGLRC && hPalette) {
+ UnrealizeObject(hPalette);
+ SelectPalette(hDC, hPalette, FALSE);
+ RealizePalette(hDC);
+ redraw();
+ return TRUE;
+ }
+ break;
+ case WM_PAINT:
+ /*
+ ** Update the window. Don't use the device context returned by
+ ** BeginPaint as it won't have the right palette selected into it.
+ */
+ if (hGLRC) {
+ PAINTSTRUCT ps;
+
+ BeginPaint(hWnd, &ps);
+ redraw();
+ EndPaint(hWnd, &ps);
+ return 0;
+ }
+ break;
+ case WM_CHAR:
+ switch ((int)wParam) {
+ case VK_ESCAPE:
+ DestroyWindow(hWnd);
+ return 0;
+ case VK_SPACE:
+ if (idleFunc) {
+ idleFunc = NULL;
+ } else {
+ idleFunc = doRedraw;
+ }
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ /* Deal with any unprocessed messages */
+ return DefWindowProc(hWnd, message, wParam, lParam);
+}
+
+int APIENTRY
+WinMain(
+ HINSTANCE hCurrentInst,
+ HINSTANCE hPreviousInst,
+ LPSTR lpszCmdLine,
+ int nCmdShow)
+{
+ const GLubyte * Ret;
+ WNDCLASS wndClass;
+ HWND hWnd;
+ MSG msg;
+
+ __asm int 3;
+ Ret = glGetString( GL_EXTENSIONS );
+
+ /* Define and register a window class */
+ wndClass.style = CS_HREDRAW | CS_VREDRAW;
+ wndClass.lpfnWndProc = WndProc;
+ wndClass.cbClsExtra = 0;
+ wndClass.cbWndExtra = 0;
+ wndClass.hInstance = hCurrentInst;
+ wndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
+ wndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
+ wndClass.hbrBackground = GetStockObject(WHITE_BRUSH);
+ wndClass.lpszMenuName = NULL;
+ wndClass.lpszClassName = className;
+ RegisterClass(&wndClass);
+
+ /* Create a window of the previously defined class */
+ hWnd = CreateWindow(
+ className, /* Window class's name */
+ windowName, /* Title bar text */
+ WS_OVERLAPPEDWINDOW | /* The window's style */
+ WS_CLIPCHILDREN |
+ WS_CLIPSIBLINGS,
+ winX, winY, /* Position */
+ winWidth, winHeight, /* Size */
+ NULL, /* Parent window's handle */
+ NULL, /* Menu handle */
+ hCurrentInst, /* Instance handle */
+ NULL); /* No additional data */
+
+ /* Map the window to the screen */
+ ShowWindow(hWnd, nCmdShow);
+
+ /* Force the window to repaint itself */
+ UpdateWindow(hWnd);
+
+ /*
+ ** Set up for OpenGL rendering. Bind the rendering context to
+ ** the same device context that the palette will be selected into.
+ */
+ hDC = GetDC(hWnd);
+ hDCFrontBuffer = hDC;
+ if (renderToDIB) {
+ hDC = CreateCompatibleDC(hDCFrontBuffer);
+ setupDIB(hDC);
+ }
+ Ret = glGetString( GL_EXTENSIONS );
+ setupPixelFormat(hDC);
+ Ret = glGetString( GL_EXTENSIONS );
+ setupPalette(hDC);
+ Ret = glGetString( GL_EXTENSIONS );
+ hGLRC = wglCreateContext(hDC);
+ Ret = glGetString( GL_EXTENSIONS );
+ wglMakeCurrent(hDC, hGLRC);
+ Ret = glGetString( GL_EXTENSIONS );
+ init();
+ idleFunc = doRedraw;
+
+
+
+ /* Process Messages */
+ while (1) {
+ /* execute the idle function while there are no messages to process */
+ while (idleFunc &&
+ PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE) == FALSE)
+ {
+ (*idleFunc)();
+ }
+ if (GetMessage(&msg, NULL, 0, 0) != TRUE) {
+ break;
+ }
+ TranslateMessage(&msg);
+ DispatchMessage(&msg);
+ }
+
+ /*
+ ** Finish OpenGL rendering.
+ */
+ idleFunc = NULL;
+ if (hGLRC) {
+ wglMakeCurrent(NULL, NULL);
+ wglDeleteContext(hGLRC);
+ }
+ ReleaseDC(hWnd, hDC);
+
+ return msg.wParam;
+}
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