зеркало из https://github.com/mozilla/moz-skia.git
Unify wgl context creation.
R=robertphillips@google.com Review URL: https://codereview.chromium.org/12455009 git-svn-id: http://skia.googlecode.com/svn/trunk@7990 2bbb7eff-a529-9590-31e7-b0007b416f81
This commit is contained in:
bsalomon@google.com
Родитель
77472f06f8
Коммит
b7f20f20ac
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@ -106,4 +106,12 @@ private:
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CreateContextAttribsProc fCreateContextAttribs;
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};
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/**
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* Helper to create an OpenGL context for a DC using WGL. Configs with a sample count >= to
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* msaaSampleCount are preferred but if none is available then a context with a lower sample count
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* (including non-MSAA) will be created. If preferCoreProfile is true but a core profile cannot be
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* created then a compatible profile context will be created.
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*/
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HGLRC SkCreateWGLContext(HDC dc, int msaaSampleCount, bool preferCoreProfile);
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#endif
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@ -7,6 +7,7 @@
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*/
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#include "gl/SkNativeGLContext.h"
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#include "SkWGL.h"
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#define WIN32_LEAN_AND_MEAN
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#include <Windows.h>
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@ -49,35 +50,6 @@ void SkNativeGLContext::destroyGLContext() {
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const GrGLInterface* SkNativeGLContext::createGLContext() {
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HINSTANCE hInstance = (HINSTANCE)GetModuleHandle(NULL);
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if (!gWC) {
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WNDCLASS wc;
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wc.cbClsExtra = 0;
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wc.cbWndExtra = 0;
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wc.hbrBackground = NULL;
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wc.hCursor = LoadCursor(NULL, IDC_ARROW);
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wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
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wc.hInstance = hInstance;
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wc.lpfnWndProc = (WNDPROC) DefWindowProc;
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wc.lpszClassName = TEXT("Griffin");
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wc.lpszMenuName = NULL;
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wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
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gWC = RegisterClass(&wc);
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if (!gWC) {
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SkDebugf("Could not register window class.\n");
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return NULL;
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}
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}
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if (!(fWindow = CreateWindow(TEXT("Griffin"),
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TEXT("The Invisible Man"),
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WS_OVERLAPPEDWINDOW,
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0, 0, 1, 1,
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NULL, NULL,
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hInstance, NULL))) {
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SkDebugf("Could not create window.\n");
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return NULL;
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}
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if (!(fDeviceContext = GetDC(fWindow))) {
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SkDebugf("Could not get device context.\n");
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@ -85,31 +57,7 @@ const GrGLInterface* SkNativeGLContext::createGLContext() {
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return NULL;
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}
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PIXELFORMATDESCRIPTOR pfd;
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ZeroMemory(&pfd, sizeof(pfd));
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pfd.nSize = sizeof(pfd);
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pfd.nVersion = 1;
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pfd.dwFlags = PFD_SUPPORT_OPENGL;
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pfd.iPixelType = PFD_TYPE_RGBA;
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pfd.cColorBits = 32;
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pfd.cDepthBits = 0;
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pfd.cStencilBits = 0;
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pfd.iLayerType = PFD_MAIN_PLANE;
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int pixelFormat = 0;
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if (!(pixelFormat = ChoosePixelFormat(fDeviceContext, &pfd))) {
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SkDebugf("No matching pixel format descriptor.\n");
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this->destroyGLContext();
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return NULL;
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}
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if (!SetPixelFormat(fDeviceContext, pixelFormat, &pfd)) {
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SkDebugf("Could not set the pixel format %d.\n", pixelFormat);
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this->destroyGLContext();
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return NULL;
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}
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if (!(fGlRenderContext = wglCreateContext(fDeviceContext))) {
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if (!(fGlRenderContext = SkCreateWGLContext(fDeviceContext, 0, false))) {
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SkDebugf("Could not create rendering context.\n");
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this->destroyGLContext();
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return NULL;
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@ -263,3 +263,109 @@ SkWGLExtensions::SkWGLExtensions()
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wglMakeCurrent(prevDC, prevGLRC);
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}
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HGLRC SkCreateWGLContext(HDC dc, int msaaSampleCount, bool preferCoreProfile) {
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SkWGLExtensions extensions;
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if (!extensions.hasExtension(dc, "WGL_ARB_pixel_format")) {
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return NULL;
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}
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HDC prevDC = wglGetCurrentDC();
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HGLRC prevGLRC = wglGetCurrentContext();
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PIXELFORMATDESCRIPTOR pfd;
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int format = 0;
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static const int iAttrs[] = {
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SK_WGL_DRAW_TO_WINDOW, TRUE,
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SK_WGL_DOUBLE_BUFFER, TRUE,
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SK_WGL_ACCELERATION, SK_WGL_FULL_ACCELERATION,
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SK_WGL_SUPPORT_OPENGL, TRUE,
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SK_WGL_COLOR_BITS, 24,
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SK_WGL_ALPHA_BITS, 8,
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SK_WGL_STENCIL_BITS, 8,
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0, 0
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};
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float fAttrs[] = {0, 0};
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if (msaaSampleCount > 0 &&
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extensions.hasExtension(dc, "WGL_ARB_multisample")) {
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static const int kIAttrsCount = SK_ARRAY_COUNT(iAttrs);
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int msaaIAttrs[kIAttrsCount + 6];
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memcpy(msaaIAttrs, iAttrs, sizeof(int) * kIAttrsCount);
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SkASSERT(0 == msaaIAttrs[kIAttrsCount - 2] &&
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0 == msaaIAttrs[kIAttrsCount - 1]);
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msaaIAttrs[kIAttrsCount - 2] = SK_WGL_SAMPLE_BUFFERS;
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msaaIAttrs[kIAttrsCount - 1] = TRUE;
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msaaIAttrs[kIAttrsCount + 0] = SK_WGL_SAMPLES;
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msaaIAttrs[kIAttrsCount + 1] = msaaSampleCount;
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if (extensions.hasExtension(dc, "WGL_NV_multisample_coverage")) {
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msaaIAttrs[kIAttrsCount + 2] = SK_WGL_COLOR_SAMPLES;
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// We want the fewest number of color samples possible.
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// Passing 0 gives only the formats where all samples are color
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// samples.
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msaaIAttrs[kIAttrsCount + 3] = 1;
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msaaIAttrs[kIAttrsCount + 4] = 0;
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msaaIAttrs[kIAttrsCount + 5] = 0;
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} else {
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msaaIAttrs[kIAttrsCount + 2] = 0;
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msaaIAttrs[kIAttrsCount + 3] = 0;
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}
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unsigned int num;
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int formats[64];
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extensions.choosePixelFormat(dc, msaaIAttrs, fAttrs, 64, formats, &num);
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num = min(num,64);
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int formatToTry = extensions.selectFormat(formats,
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num,
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dc,
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msaaSampleCount);
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DescribePixelFormat(dc, formatToTry, sizeof(pfd), &pfd);
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if (SetPixelFormat(dc, formatToTry, &pfd)) {
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format = formatToTry;
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}
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}
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if (0 == format) {
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// Either MSAA wasn't requested or creation failed
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unsigned int num;
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extensions.choosePixelFormat(dc, iAttrs, fAttrs, 1, &format, &num);
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DescribePixelFormat(dc, format, sizeof(pfd), &pfd);
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BOOL set = SetPixelFormat(dc, format, &pfd);
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SkASSERT(TRUE == set);
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}
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HGLRC glrc = NULL;
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if (preferCoreProfile && extensions.hasExtension(dc, "WGL_ARB_create_context")) {
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static const int kCoreGLVersions[] = {
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4, 3,
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4, 2,
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4, 1,
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4, 0,
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3, 3,
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3, 2,
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};
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int coreProfileAttribs[] = {
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SK_WGL_CONTEXT_MAJOR_VERSION, -1,
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SK_WGL_CONTEXT_MINOR_VERSION, -1,
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SK_WGL_CONTEXT_PROFILE_MASK, SK_WGL_CONTEXT_CORE_PROFILE_BIT,
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0,
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};
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for (int v = 0; v < SK_ARRAY_COUNT(kCoreGLVersions) / 2; ++v) {
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coreProfileAttribs[1] = kCoreGLVersions[2 * v];
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coreProfileAttribs[3] = kCoreGLVersions[2 * v + 1];
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glrc = extensions.createContextAttribs(dc, NULL, coreProfileAttribs);
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if (NULL != glrc) {
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break;
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}
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}
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}
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if (NULL == glrc) {
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glrc = wglCreateContext(dc);
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}
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SkASSERT(glrc);
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wglMakeCurrent(prevDC, prevGLRC);
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return glrc;
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}
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@ -323,119 +323,11 @@ void SkEvent::SignalQueueTimer(SkMSec delay)
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}
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#if SK_SUPPORT_GPU
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HGLRC create_gl(HWND hwnd, int msaaSampleCount) {
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HDC dc = GetDC(hwnd);
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SkWGLExtensions extensions;
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if (!extensions.hasExtension(dc, "WGL_ARB_pixel_format")) {
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return NULL;
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}
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HDC prevDC = wglGetCurrentDC();
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HGLRC prevGLRC = wglGetCurrentContext();
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PIXELFORMATDESCRIPTOR pfd;
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int format = 0;
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static const GLint iAttrs[] = {
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SK_WGL_DRAW_TO_WINDOW, TRUE,
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SK_WGL_DOUBLE_BUFFER, TRUE,
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SK_WGL_ACCELERATION, SK_WGL_FULL_ACCELERATION,
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SK_WGL_SUPPORT_OPENGL, TRUE,
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SK_WGL_COLOR_BITS, 24,
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SK_WGL_ALPHA_BITS, 8,
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SK_WGL_STENCIL_BITS, 8,
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0, 0
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};
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GLfloat fAttrs[] = {0, 0};
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if (msaaSampleCount > 0 &&
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extensions.hasExtension(dc, "WGL_ARB_multisample")) {
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static const int kIAttrsCount = SK_ARRAY_COUNT(iAttrs);
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GLint msaaIAttrs[kIAttrsCount + 6];
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memcpy(msaaIAttrs, iAttrs, sizeof(GLint) * kIAttrsCount);
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SkASSERT(0 == msaaIAttrs[kIAttrsCount - 2] &&
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0 == msaaIAttrs[kIAttrsCount - 1]);
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msaaIAttrs[kIAttrsCount - 2] = SK_WGL_SAMPLE_BUFFERS;
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msaaIAttrs[kIAttrsCount - 1] = TRUE;
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msaaIAttrs[kIAttrsCount + 0] = SK_WGL_SAMPLES;
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msaaIAttrs[kIAttrsCount + 1] = msaaSampleCount;
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if (extensions.hasExtension(dc, "WGL_NV_multisample_coverage")) {
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msaaIAttrs[kIAttrsCount + 2] = SK_WGL_COLOR_SAMPLES;
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// We want the fewest number of color samples possible.
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// Passing 0 gives only the formats where all samples are color
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// samples.
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msaaIAttrs[kIAttrsCount + 3] = 1;
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msaaIAttrs[kIAttrsCount + 4] = 0;
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msaaIAttrs[kIAttrsCount + 5] = 0;
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} else {
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msaaIAttrs[kIAttrsCount + 2] = 0;
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msaaIAttrs[kIAttrsCount + 3] = 0;
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}
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GLuint num;
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int formats[64];
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extensions.choosePixelFormat(dc, msaaIAttrs, fAttrs, 64, formats, &num);
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num = min(num,64);
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int formatToTry = extensions.selectFormat(formats,
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num,
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dc,
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msaaSampleCount);
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DescribePixelFormat(dc, formatToTry, sizeof(pfd), &pfd);
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if (SetPixelFormat(dc, formatToTry, &pfd)) {
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format = formatToTry;
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}
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}
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if (0 == format) {
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GLuint num;
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extensions.choosePixelFormat(dc, iAttrs, fAttrs, 1, &format, &num);
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DescribePixelFormat(dc, format, sizeof(pfd), &pfd);
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BOOL set = SetPixelFormat(dc, format, &pfd);
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SkASSERT(TRUE == set);
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}
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HGLRC glrc = NULL;
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#if 0 // Change to 1 to attempt to create a core profile GL context of version 4.3 or lower
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if (extensions.hasExtension(dc, "WGL_ARB_create_context")) {
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static const GLint kCoreGLVersions[] = {
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4, 3,
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4, 2,
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4, 1,
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4, 0,
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3, 3,
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3, 2,
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};
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GLint coreProfileAttribs[] = {
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SK_WGL_CONTEXT_MAJOR_VERSION, -1,
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SK_WGL_CONTEXT_MINOR_VERSION, -1,
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SK_WGL_CONTEXT_PROFILE_MASK, SK_WGL_CONTEXT_CORE_PROFILE_BIT,
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0,
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};
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for (int v = 0; v < SK_ARRAY_COUNT(kCoreGLVersions) / 2; ++v) {
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coreProfileAttribs[1] = kCoreGLVersions[2 * v];
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coreProfileAttribs[3] = kCoreGLVersions[2 * v + 1];
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glrc = extensions.createContextAttribs(dc, NULL, coreProfileAttribs);
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if (NULL != glrc) {
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break;
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}
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}
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}
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#endif
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if (NULL == glrc) {
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glrc = wglCreateContext(dc);
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}
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SkASSERT(glrc);
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wglMakeCurrent(prevDC, prevGLRC);
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return glrc;
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}
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bool SkOSWindow::attachGL(int msaaSampleCount) {
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HDC dc = GetDC((HWND)fHWND);
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if (NULL == fHGLRC) {
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fHGLRC = create_gl((HWND)fHWND, msaaSampleCount);
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fHGLRC = SkCreateWGLContext(dc, msaaSampleCount, false);
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if (NULL == fHGLRC) {
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return false;
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}
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@ -444,7 +336,7 @@ bool SkOSWindow::attachGL(int msaaSampleCount) {
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glStencilMask(0xffffffff);
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glClear(GL_STENCIL_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
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}
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if (wglMakeCurrent(GetDC((HWND)fHWND), (HGLRC)fHGLRC)) {
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if (wglMakeCurrent(dc, (HGLRC)fHGLRC)) {
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glViewport(0, 0, SkScalarRound(this->width()),
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SkScalarRound(this->height()));
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return true;
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