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-rw-r--r--app/gfx/gl/gl_context_win.cc196
1 files changed, 101 insertions, 95 deletions
diff --git a/app/gfx/gl/gl_context_win.cc b/app/gfx/gl/gl_context_win.cc
index e481325..8e24f94 100644
--- a/app/gfx/gl/gl_context_win.cc
+++ b/app/gfx/gl/gl_context_win.cc
@@ -4,17 +4,21 @@
// This file implements the NativeViewGLContext and PbufferGLContext classes.
+#include "app/gfx/gl/gl_context.h"
+
+#include <GL/osmesa.h>
+
#include <algorithm>
-#include "base/logging.h"
-#include "base/scoped_ptr.h"
#include "app/gfx/gl/gl_bindings.h"
-#include "app/gfx/gl/gl_context.h"
#include "app/gfx/gl/gl_context_egl.h"
#include "app/gfx/gl/gl_context_osmesa.h"
#include "app/gfx/gl/gl_context_stub.h"
#include "app/gfx/gl/gl_implementation.h"
+#include "base/logging.h"
+#include "base/scoped_ptr.h"
+
namespace gfx {
typedef HGLRC GLContextHandle;
@@ -148,20 +152,22 @@ LRESULT CALLBACK IntermediateWindowProc(HWND window,
// Helper routine that does one-off initialization like determining the
// pixel format and initializing glew.
-static bool InitializeOneOff() {
+bool GLContext::InitializeOneOff() {
static bool initialized = false;
if (initialized)
return true;
- if (!InitializeGLBindings(kGLImplementationOSMesaGL)) {
- if (!InitializeGLBindings(kGLImplementationEGLGLES2)) {
- if (!InitializeGLBindings(kGLImplementationDesktopGL)) {
- LOG(ERROR) << "Could not initialize GL.";
- return false;
- }
- }
- }
+ static const GLImplementation kAllowedGLImplementations[] = {
+ kGLImplementationEGLGLES2,
+ kGLImplementationDesktopGL,
+ kGLImplementationOSMesaGL
+ };
+ if (!InitializeBestGLBindings(
+ kAllowedGLImplementations,
+ kAllowedGLImplementations + arraysize(kAllowedGLImplementations))) {
+ return false;
+ }
// We must initialize a GL context before we can determine the multi-
// sampling supported on the current hardware, so we create an intermediate
@@ -209,87 +215,91 @@ static bool InitializeOneOff() {
}
// Early out if OSMesa offscreen renderer or EGL is present.
- if (GetGLImplementation() != kGLImplementationDesktopGL) {
- initialized = true;
- return true;
- }
-
- HDC intermediate_dc = ::GetDC(g_window);
- g_regular_pixel_format = ::ChoosePixelFormat(intermediate_dc,
- &kPixelFormatDescriptor);
- if (g_regular_pixel_format == 0) {
- DLOG(ERROR) << "Unable to get the pixel format for GL context.";
- ::ReleaseDC(g_window, intermediate_dc);
- ::DestroyWindow(g_window);
- ::UnregisterClass(reinterpret_cast<wchar_t*>(class_registration),
- module_handle);
- return false;
- }
- if (!::SetPixelFormat(intermediate_dc, g_regular_pixel_format,
- &kPixelFormatDescriptor)) {
- DLOG(ERROR) << "Unable to set the pixel format for GL context.";
- ::ReleaseDC(g_window, intermediate_dc);
- ::DestroyWindow(g_window);
- ::UnregisterClass(reinterpret_cast<wchar_t*>(class_registration),
- module_handle);
- return false;
- }
+ switch (GetGLImplementation()) {
+ case kGLImplementationDesktopGL: {
+ HDC intermediate_dc = ::GetDC(g_window);
+ g_regular_pixel_format = ::ChoosePixelFormat(intermediate_dc,
+ &kPixelFormatDescriptor);
+ if (g_regular_pixel_format == 0) {
+ DLOG(ERROR) << "Unable to get the pixel format for GL context.";
+ ::ReleaseDC(g_window, intermediate_dc);
+ ::DestroyWindow(g_window);
+ ::UnregisterClass(reinterpret_cast<wchar_t*>(class_registration),
+ module_handle);
+ return false;
+ }
+ if (!::SetPixelFormat(intermediate_dc, g_regular_pixel_format,
+ &kPixelFormatDescriptor)) {
+ DLOG(ERROR) << "Unable to set the pixel format for GL context.";
+ ::ReleaseDC(g_window, intermediate_dc);
+ ::DestroyWindow(g_window);
+ ::UnregisterClass(reinterpret_cast<wchar_t*>(class_registration),
+ module_handle);
+ return false;
+ }
- // Create a temporary GL context to query for multisampled pixel formats.
- HGLRC gl_context = wglCreateContext(intermediate_dc);
- if (wglMakeCurrent(intermediate_dc, gl_context)) {
- // Get bindings to extension functions that cannot be acquired without a
- // current context.
- InitializeGLBindingsGL();
- InitializeGLBindingsWGL();
-
- // If the multi-sample extensions are present, query the api to determine
- // the pixel format.
- if (wglGetExtensionsStringARB) {
- std::string extensions =
- std::string(wglGetExtensionsStringARB(intermediate_dc));
- extensions += std::string(" ");
- if (extensions.find("WGL_ARB_pixel_format ")) {
- int pixel_attributes[] = {
- WGL_SAMPLES_ARB, 4,
- WGL_DRAW_TO_WINDOW_ARB, GL_TRUE,
- WGL_SUPPORT_OPENGL_ARB, GL_TRUE,
- WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB,
- WGL_COLOR_BITS_ARB, 24,
- WGL_ALPHA_BITS_ARB, 8,
- WGL_DEPTH_BITS_ARB, 24,
- WGL_STENCIL_BITS_ARB, 8,
- WGL_DOUBLE_BUFFER_ARB, GL_TRUE,
- WGL_SAMPLE_BUFFERS_ARB, GL_TRUE,
- 0, 0};
-
- float pixel_attributes_f[] = {0, 0};
- unsigned int num_formats;
-
- // Query for the highest sampling rate supported, starting at 4x.
- static const int kSampleCount[] = {4, 2};
- static const int kNumSamples = 2;
- for (int sample = 0; sample < kNumSamples; ++sample) {
- pixel_attributes[1] = kSampleCount[sample];
- if (GL_TRUE == wglChoosePixelFormatARB(intermediate_dc,
- pixel_attributes,
- pixel_attributes_f,
- 1,
- &g_multisampled_pixel_format,
- &num_formats)) {
- break;
+ // Create a temporary GL context to query for multisampled pixel formats.
+ HGLRC gl_context = wglCreateContext(intermediate_dc);
+ if (wglMakeCurrent(intermediate_dc, gl_context)) {
+ // Get bindings to extension functions that cannot be acquired without a
+ // current context.
+ InitializeGLBindingsGL();
+ InitializeGLBindingsWGL();
+
+ // If the multi-sample extensions are present, query the api to
+ // determine the pixel format.
+ if (wglGetExtensionsStringARB) {
+ std::string extensions =
+ std::string(wglGetExtensionsStringARB(intermediate_dc));
+ extensions += std::string(" ");
+ if (extensions.find("WGL_ARB_pixel_format ")) {
+ int pixel_attributes[] = {
+ WGL_SAMPLES_ARB, 4,
+ WGL_DRAW_TO_WINDOW_ARB, GL_TRUE,
+ WGL_SUPPORT_OPENGL_ARB, GL_TRUE,
+ WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB,
+ WGL_COLOR_BITS_ARB, 24,
+ WGL_ALPHA_BITS_ARB, 8,
+ WGL_DEPTH_BITS_ARB, 24,
+ WGL_STENCIL_BITS_ARB, 8,
+ WGL_DOUBLE_BUFFER_ARB, GL_TRUE,
+ WGL_SAMPLE_BUFFERS_ARB, GL_TRUE,
+ 0, 0};
+
+ float pixel_attributes_f[] = {0, 0};
+ unsigned int num_formats;
+
+ // Query for the highest sampling rate supported, starting at 4x.
+ static const int kSampleCount[] = {4, 2};
+ static const int kNumSamples = 2;
+ for (int sample = 0; sample < kNumSamples; ++sample) {
+ pixel_attributes[1] = kSampleCount[sample];
+ if (wglChoosePixelFormatARB(intermediate_dc,
+ pixel_attributes,
+ pixel_attributes_f,
+ 1,
+ &g_multisampled_pixel_format,
+ &num_formats)) {
+ break;
+ }
+ }
}
}
}
+
+ wglMakeCurrent(intermediate_dc, NULL);
+ wglDeleteContext(gl_context);
+ ReleaseDC(g_window, intermediate_dc);
+ UnregisterClass(reinterpret_cast<wchar_t*>(class_registration),
+ module_handle);
+ break;
}
+ case kGLImplementationEGLGLES2:
+ if (!BaseEGLContext::InitializeOneOff())
+ return false;
+ break;
}
- wglMakeCurrent(intermediate_dc, NULL);
- wglDeleteContext(gl_context);
- ReleaseDC(g_window, intermediate_dc);
- UnregisterClass(reinterpret_cast<wchar_t*>(class_registration),
- module_handle);
-
initialized = true;
return true;
}
@@ -381,7 +391,7 @@ bool OSMesaViewGLContext::Initialize() {
// The GL context will render to this window.
device_context_ = GetDC(window_);
- if (!osmesa_context_.Initialize(NULL)) {
+ if (!osmesa_context_.Initialize(OSMESA_RGBA, NULL)) {
Destroy();
return false;
}
@@ -426,9 +436,11 @@ void OSMesaViewGLContext::SwapBuffers() {
gfx::Size size = osmesa_context_.GetSize();
+ // Note: negating the height below causes GDI to treat the bitmap data as row
+ // 0 being at the top.
BITMAPV4HEADER info = { sizeof(BITMAPV4HEADER) };
info.bV4Width = size.width();
- info.bV4Height = size.height();
+ info.bV4Height = -size.height();
info.bV4Planes = 1;
info.bV4BitCount = 32;
info.bV4V4Compression = BI_BITFIELDS;
@@ -467,9 +479,6 @@ void OSMesaViewGLContext::UpdateSize() {
GLContext* GLContext::CreateViewGLContext(gfx::PluginWindowHandle window,
bool multisampled) {
- if (!InitializeOneOff())
- return NULL;
-
switch (GetGLImplementation()) {
case kGLImplementationOSMesaGL: {
scoped_ptr<OSMesaViewGLContext> context(new OSMesaViewGLContext(window));
@@ -608,13 +617,10 @@ void* PbufferGLContext::GetHandle() {
}
GLContext* GLContext::CreateOffscreenGLContext(GLContext* shared_context) {
- if (!InitializeOneOff())
- return NULL;
-
switch (GetGLImplementation()) {
case kGLImplementationOSMesaGL: {
scoped_ptr<OSMesaGLContext> context(new OSMesaGLContext);
- if (!context->Initialize(shared_context))
+ if (!context->Initialize(OSMESA_RGBA, shared_context))
return NULL;
return context.release();
generated by cgit v1.1 at 2025-04-02 11:40:23 +0000