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authorBrian Paul <brianp@vmware.com>2017-04-26 14:29:52 -0600
committerBrian Paul <brianp@vmware.com>2017-04-27 15:08:26 -0600
commit14688d8410c8bd8d3918017c0d774ffdb013d3c2 (patch)
tree5d10880279f51fe2e09dd3e94cbe7a6e319fdd3a
parent17e46fdef7076c2506f343c16f8056d71361dde6 (diff)
downloadmesa-demos-14688d8410c8bd8d3918017c0d774ffdb013d3c2.zip
mesa-demos-14688d8410c8bd8d3918017c0d774ffdb013d3c2.tar.xz
wglgears.c: add -srgb option
To test sRGB pixel format selection and sRGB rendering. This involves choosing a new pixel format, creating a new context, etc. Reviewed-by: Neha Bhende <bhenden@vmware.com>
-rw-r--r--src/wgl/wglgears.c91
1 files changed, 88 insertions, 3 deletions
diff --git a/src/wgl/wglgears.c b/src/wgl/wglgears.c
index d90d603..7d43822 100644
--- a/src/wgl/wglgears.c
+++ b/src/wgl/wglgears.c
@@ -30,6 +30,7 @@
* 25th October 2004
*/
+#include <assert.h>
#include <windows.h>
#include <GL/gl.h>
#include <GL/wglext.h>
@@ -48,6 +49,14 @@
#define M_PI 3.14159265
#endif /* !M_PI */
+#ifndef WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB
+#define WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB 0x20A9
+#endif
+
+#ifndef GL_FRAMEBUFFER_SRGB
+#define GL_FRAMEBUFFER_SRGB 0x8db9
+#endif
+
/* Global vars */
static HDC hDC;
@@ -61,6 +70,7 @@ static const char *ProgramName; /* program name (from argv[0]) */
static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
static GLint gear1, gear2, gear3;
static GLfloat angle = 0.0;
+static GLboolean use_srgb = GL_FALSE;
static
@@ -282,6 +292,9 @@ init(void)
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);
+ if (use_srgb) {
+ glEnable(GL_FRAMEBUFFER_SRGB);
+ }
/* make the gears */
gear1 = glGenLists(1);
@@ -341,7 +354,7 @@ WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
static void
make_window(const char *name, int x, int y, int width, int height)
{
- GLuint PixelFormat;
+ int pixelFormat;
WNDCLASS wc;
DWORD dwExStyle, dwStyle;
static const PIXELFORMATDESCRIPTOR pfd = {
@@ -399,14 +412,83 @@ make_window(const char *name, int x, int y, int width, int height)
}
if (!(hDC = GetDC(hWnd)) ||
- !(PixelFormat = ChoosePixelFormat(hDC, &pfd)) ||
- !(SetPixelFormat(hDC, PixelFormat, &pfd)) ||
+ !(pixelFormat = ChoosePixelFormat(hDC, &pfd)) ||
+ !(SetPixelFormat(hDC, pixelFormat, &pfd)) ||
!(hRC = wglCreateContext(hDC)) ||
!(wglMakeCurrent(hDC, hRC))) {
printf("failed to initialise opengl\n");
exit(0);
}
+ if (use_srgb) {
+ /* For sRGB we need to use the wglChoosePixelFormatARB() function,
+ * and then create a new context, window, etc.
+ *
+ * Note: we can't query/use extension functions until after we've
+ * creatend and bound a rendering context.
+ */
+ PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARB_func =
+ (PFNWGLCHOOSEPIXELFORMATARBPROC)
+ wglGetProcAddress("wglChoosePixelFormatARB");
+ assert(wglChoosePixelFormatARB_func);
+
+ static const int int_attribs[] = {
+ WGL_SUPPORT_OPENGL_ARB, TRUE,
+ //WGL_COLOR_BITS_ARB, 24,
+ //WGL_ALPHA_BITS_ARB, 8,
+ WGL_DEPTH_BITS_ARB, 24,
+ WGL_DOUBLE_BUFFER_ARB, TRUE,
+ WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB, TRUE,
+ 0
+ };
+ static const float float_attribs[] = { 0 };
+ UINT numFormats;
+
+ pixelFormat = 0;
+ if (!wglChoosePixelFormatARB_func(hDC, int_attribs, float_attribs, 1,
+ &pixelFormat, &numFormats)) {
+ printf("wglChoosePixelFormatARB failed\n");
+ exit(0);
+ }
+ assert(numFormats > 0);
+ printf("Chose sRGB pixel format %d (0x%x)\n", pixelFormat, pixelFormat);
+
+ PIXELFORMATDESCRIPTOR newPfd;
+ DescribePixelFormat(hDC, pixelFormat, sizeof(pfd), &newPfd);
+
+ /* now, create new context with new pixel format */
+ wglMakeCurrent(hDC, NULL);
+ wglDeleteContext(hRC);
+ DeleteDC(hDC);
+
+ if (!(hWnd = CreateWindowEx(dwExStyle, name, name,
+ WS_CLIPSIBLINGS | WS_CLIPCHILDREN | dwStyle,
+ 0, 0,
+ winrect.right - winrect.left,
+ winrect.bottom - winrect.top,
+ NULL, NULL, hInst, NULL))) {
+ printf("failed to create window\n");
+ exit(0);
+ }
+
+ if (!(hDC = GetDC(hWnd))) {
+ printf("GetDC() failed.\n");
+ exit(0);
+ }
+ if (!SetPixelFormat(hDC, pixelFormat, &pfd)) {
+ printf("SetPixelFormat failed %d\n", (int) GetLastError());
+ exit(0);
+ }
+ if (!(hRC = wglCreateContext(hDC))) {
+ printf("wglCreateContext() failed\n");
+ exit(0);
+ }
+ if (!wglMakeCurrent(hDC, hRC)) {
+ printf("wglMakeCurrent() failed\n");
+ exit(0);
+ }
+ }
+
ShowWindow(hWnd, SW_SHOW);
SetForegroundWindow(hWnd);
SetFocus(hWnd);
@@ -460,6 +542,9 @@ main(int argc, char *argv[])
else if (strcmp(argv[i], "-h") == 0) {
usage();
}
+ else if (strcmp(argv[i], "-srgb") == 0) {
+ use_srgb = GL_TRUE;
+ }
else {
fprintf(stderr, "%s: Unsupported option '%s'.\n", ProgramName, argv[i]);
usage();