mirror of
https://github.com/glfw/glfw.git
synced 2024-09-19 21:32:16 +00:00
Camilla Löwy
parent
babafc13db
commit
3d748cf530
@ -31,123 +31,33 @@
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#include <malloc.h>
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#include <assert.h>
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// array of pixel format attributes we need
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static const int glfwPixelFormatAttribs[] = {
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WGL_SUPPORT_OPENGL_ARB,
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WGL_DRAW_TO_WINDOW_ARB,
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WGL_PIXEL_TYPE_ARB,
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WGL_ACCELERATION_ARB,
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WGL_RED_BITS_ARB,
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WGL_RED_SHIFT_ARB,
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WGL_GREEN_BITS_ARB,
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WGL_GREEN_SHIFT_ARB,
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WGL_BLUE_BITS_ARB,
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WGL_BLUE_SHIFT_ARB,
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WGL_ALPHA_BITS_ARB,
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WGL_ALPHA_SHIFT_ARB,
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WGL_DEPTH_BITS_ARB,
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WGL_STENCIL_BITS_ARB,
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WGL_ACCUM_BITS_ARB,
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WGL_ACCUM_RED_BITS_ARB,
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WGL_ACCUM_GREEN_BITS_ARB,
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WGL_ACCUM_BLUE_BITS_ARB,
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WGL_ACCUM_ALPHA_BITS_ARB,
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WGL_AUX_BUFFERS_ARB,
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WGL_STEREO_ARB,
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WGL_DOUBLE_BUFFER_ARB,
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// ARB EXT attribs only below this line, see initPixelFormatAttribArry
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WGL_SAMPLES_ARB,
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WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB,
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WGL_COLORSPACE_EXT
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};
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// initialize array attribs with formatattribs available
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// attribs array must be at least of size sizeof(glfwPixelFormatAttribs) / sizeof(glfwPixelFormatAttribs[0])
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// returns number of valid elemets in array
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static int initPixelFormatAttribArry( int* attribs, int api )
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{
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const int numARBEXTAtrribs = 3; // Update this value when adding ARB EXT attribs
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int numAttribs = sizeof(glfwPixelFormatAttribs) / sizeof(glfwPixelFormatAttribs[0]) - numARBEXTAtrribs;
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memcpy(attribs, glfwPixelFormatAttribs, sizeof(glfwPixelFormatAttribs));
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if (_glfw.wgl.ARB_multisample)
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{
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attribs[numAttribs++] = WGL_SAMPLES_ARB;
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}
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if (api == GLFW_OPENGL_API)
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{
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if (_glfw.wgl.ARB_framebuffer_sRGB ||
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_glfw.wgl.EXT_framebuffer_sRGB)
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{
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attribs[numAttribs++] = WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB;
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}
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}
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else
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{
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if (_glfw.wgl.EXT_colorspace)
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{
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attribs[numAttribs++] = WGL_COLORSPACE_EXT;
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}
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}
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return numAttribs;
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}
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// Returns all formats in glfwPixelFormats attribute of the specified pixel format
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// values should be of size GLFW_PFA_COUNT and on return will hold integer values
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// which can be indexed using glfwEnumPixelFormatAttribs
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// returns 1 on success, 0 on failure
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static int getPixelFormatAttribs(_GLFWwindow* window, int pixelFormat, int numAttribs, int* attribs, int* values )
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{
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assert(_glfw.wgl.ARB_pixel_format);
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if (!_glfw.wgl.GetPixelFormatAttribivARB(window->context.wgl.dc,
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pixelFormat,
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0, numAttribs,
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attribs, values))
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{
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_glfwInputErrorWin32(GLFW_PLATFORM_ERROR,
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"WGL: Failed to retrieve pixel format attributes");
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return 0;
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}
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return 1;
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}
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static int getPixelFormatAttribFromArray( int* attribs, int* values, int attrib )
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// Return the value corresponding to the specified attribute
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//
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static int findPixelFormatAttribValue(const int* attribs,
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int attribCount,
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const int* values,
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int attrib)
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{
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int i;
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for (i = 0; i < sizeof(glfwPixelFormatAttribs) / sizeof(glfwPixelFormatAttribs[0]); ++i )
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for (i = 0; i < attribCount; i++)
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{
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if ( attribs[i] == attrib )
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if (attribs[i] == attrib)
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return values[i];
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}
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// error
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_glfwInputErrorWin32(GLFW_PLATFORM_ERROR,
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"WGL: Unknown attribute requested from attribute array");
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"WGL: Unknown pixel format attribute requested");
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return 0;
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}
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// Returns the specified attribute of the specified pixel format
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//
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static int getPixelFormatAttrib(_GLFWwindow* window, int pixelFormat, int attrib)
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{
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int value = 0;
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assert(_glfw.wgl.ARB_pixel_format);
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if (!_glfw.wgl.GetPixelFormatAttribivARB(window->context.wgl.dc,
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pixelFormat,
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0, 1, &attrib, &value))
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{
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_glfwInputErrorWin32(GLFW_PLATFORM_ERROR,
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"WGL: Failed to retrieve pixel format attribute");
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return 0;
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}
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return value;
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#define addAttrib(a) \
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{ \
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assert((size_t) attribCount < sizeof(attribs) / sizeof(attribs[0])); \
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attribs[attribCount++] = a; \
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}
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#define findAttribValue(a) \
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findPixelFormatAttribValue(attribs, attribCount, values, a)
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// Return a list of available and usable framebuffer configs
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//
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@ -157,17 +67,60 @@ static int choosePixelFormat(_GLFWwindow* window,
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{
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_GLFWfbconfig* usableConfigs;
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const _GLFWfbconfig* closest;
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int i, pixelFormat, nativeCount, usableCount, numAttribs, hintPos;
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int pfAttribs[sizeof(glfwPixelFormatAttribs) / sizeof(glfwPixelFormatAttribs[0])];
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int pfValues[sizeof(glfwPixelFormatAttribs) / sizeof(glfwPixelFormatAttribs[0])];
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numAttribs = initPixelFormatAttribArry(pfAttribs, ctxconfig->client);
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int i, pixelFormat, nativeCount, usableCount, attribCount;
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int attribs[40];
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int values[sizeof(attribs) / sizeof(attribs[0])];
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if (_glfw.wgl.ARB_pixel_format)
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{
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nativeCount = getPixelFormatAttrib(window,
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1,
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WGL_NUMBER_PIXEL_FORMATS_ARB);
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const int attrib = WGL_NUMBER_PIXEL_FORMATS_ARB;
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if (!_glfw.wgl.GetPixelFormatAttribivARB(window->context.wgl.dc,
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1, 0, 1, &attrib, &nativeCount))
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{
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_glfwInputErrorWin32(GLFW_PLATFORM_ERROR,
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"WGL: Failed to retrieve pixel format attribute");
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return 0;
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}
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attribCount = 0;
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addAttrib(WGL_SUPPORT_OPENGL_ARB);
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addAttrib(WGL_DRAW_TO_WINDOW_ARB);
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addAttrib(WGL_PIXEL_TYPE_ARB);
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addAttrib(WGL_ACCELERATION_ARB);
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addAttrib(WGL_RED_BITS_ARB);
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addAttrib(WGL_RED_SHIFT_ARB);
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addAttrib(WGL_GREEN_BITS_ARB);
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addAttrib(WGL_GREEN_SHIFT_ARB);
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addAttrib(WGL_BLUE_BITS_ARB);
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addAttrib(WGL_BLUE_SHIFT_ARB);
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addAttrib(WGL_ALPHA_BITS_ARB);
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addAttrib(WGL_ALPHA_SHIFT_ARB);
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addAttrib(WGL_DEPTH_BITS_ARB);
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addAttrib(WGL_STENCIL_BITS_ARB);
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addAttrib(WGL_ACCUM_BITS_ARB);
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addAttrib(WGL_ACCUM_RED_BITS_ARB);
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addAttrib(WGL_ACCUM_GREEN_BITS_ARB);
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addAttrib(WGL_ACCUM_BLUE_BITS_ARB);
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addAttrib(WGL_ACCUM_ALPHA_BITS_ARB);
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addAttrib(WGL_AUX_BUFFERS_ARB);
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addAttrib(WGL_STEREO_ARB);
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addAttrib(WGL_DOUBLE_BUFFER_ARB);
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if (_glfw.wgl.ARB_multisample)
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addAttrib(WGL_SAMPLES_ARB);
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if (ctxconfig->client == GLFW_OPENGL_API)
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{
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if (_glfw.wgl.ARB_framebuffer_sRGB || _glfw.wgl.EXT_framebuffer_sRGB)
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addAttrib(WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB);
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}
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else
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{
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if (_glfw.wgl.EXT_colorspace)
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addAttrib(WGL_COLORSPACE_EXT);
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}
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}
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else
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{
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@ -182,62 +135,64 @@ static int choosePixelFormat(_GLFWwindow* window,
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for (i = 0; i < nativeCount; i++)
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{
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const int n = i + 1;
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_GLFWfbconfig* u = usableConfigs + usableCount;
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pixelFormat = i + 1;
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if (_glfw.wgl.ARB_pixel_format)
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{
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// Get pixel format attributes through "modern" extension
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getPixelFormatAttribs(window, n, numAttribs, pfAttribs, pfValues );
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hintPos = 0;
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if (!getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_SUPPORT_OPENGL_ARB) ||
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!getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_DRAW_TO_WINDOW_ARB))
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if (!_glfw.wgl.GetPixelFormatAttribivARB(window->context.wgl.dc,
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pixelFormat, 0,
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attribCount,
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attribs, values))
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{
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_glfwInputErrorWin32(GLFW_PLATFORM_ERROR,
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"WGL: Failed to retrieve pixel format attributes");
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return 0;
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}
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if (!findAttribValue(WGL_SUPPORT_OPENGL_ARB) ||
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!findAttribValue(WGL_DRAW_TO_WINDOW_ARB))
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{
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continue;
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}
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if (getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_PIXEL_TYPE_ARB) !=
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WGL_TYPE_RGBA_ARB )
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{
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if (findAttribValue(WGL_PIXEL_TYPE_ARB) != WGL_TYPE_RGBA_ARB)
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continue;
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}
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if (getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_ACCELERATION_ARB) ==
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WGL_NO_ACCELERATION_ARB )
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{
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if (findAttribValue(WGL_ACCELERATION_ARB) == WGL_NO_ACCELERATION_ARB)
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continue;
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}
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u->redBits = getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_RED_BITS_ARB);
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u->greenBits = getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_GREEN_BITS_ARB);
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u->blueBits = getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_BLUE_BITS_ARB);
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u->alphaBits = getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_ALPHA_BITS_ARB);
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u->redBits = findAttribValue(WGL_RED_BITS_ARB);
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u->greenBits = findAttribValue(WGL_GREEN_BITS_ARB);
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u->blueBits = findAttribValue(WGL_BLUE_BITS_ARB);
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u->alphaBits = findAttribValue(WGL_ALPHA_BITS_ARB);
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u->depthBits = getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_DEPTH_BITS_ARB);
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u->stencilBits = getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_STENCIL_BITS_ARB);
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u->depthBits = findAttribValue(WGL_DEPTH_BITS_ARB);
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u->stencilBits = findAttribValue(WGL_STENCIL_BITS_ARB);
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u->accumRedBits = getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_ACCUM_RED_BITS_ARB);
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u->accumGreenBits = getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_ACCUM_GREEN_BITS_ARB);
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u->accumBlueBits = getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_ACCUM_BLUE_BITS_ARB);
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u->accumAlphaBits = getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_ACCUM_ALPHA_BITS_ARB);
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u->accumRedBits = findAttribValue(WGL_ACCUM_RED_BITS_ARB);
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u->accumGreenBits = findAttribValue(WGL_ACCUM_GREEN_BITS_ARB);
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u->accumBlueBits = findAttribValue(WGL_ACCUM_BLUE_BITS_ARB);
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u->accumAlphaBits = findAttribValue(WGL_ACCUM_ALPHA_BITS_ARB);
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u->auxBuffers = getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_AUX_BUFFERS_ARB);
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u->auxBuffers = findAttribValue(WGL_AUX_BUFFERS_ARB);
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if (getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_STEREO_ARB))
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if (findAttribValue(WGL_STEREO_ARB))
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u->stereo = GLFW_TRUE;
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if (getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_DOUBLE_BUFFER_ARB))
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if (findAttribValue(WGL_DOUBLE_BUFFER_ARB))
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u->doublebuffer = GLFW_TRUE;
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if (_glfw.wgl.ARB_multisample)
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u->samples = getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_SAMPLES_ARB);
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u->samples = findAttribValue(WGL_SAMPLES_ARB);
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if (ctxconfig->client == GLFW_OPENGL_API)
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{
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if (_glfw.wgl.ARB_framebuffer_sRGB ||
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_glfw.wgl.EXT_framebuffer_sRGB)
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{
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if (getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB))
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if (findAttribValue(WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB))
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u->sRGB = GLFW_TRUE;
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}
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}
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@ -245,14 +200,11 @@ static int choosePixelFormat(_GLFWwindow* window,
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{
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if (_glfw.wgl.EXT_colorspace)
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{
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if (getPixelFormatAttribFromArray(pfAttribs, pfValues, WGL_COLORSPACE_EXT) ==
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WGL_COLORSPACE_SRGB_EXT)
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{
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if (findAttribValue(WGL_COLORSPACE_EXT) == WGL_COLORSPACE_SRGB_EXT)
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u->sRGB = GLFW_TRUE;
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}
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}
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}
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}
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else
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{
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// Get pixel format attributes through legacy PFDs
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@ -260,7 +212,7 @@ static int choosePixelFormat(_GLFWwindow* window,
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PIXELFORMATDESCRIPTOR pfd;
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if (!DescribePixelFormat(window->context.wgl.dc,
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n,
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pixelFormat,
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sizeof(PIXELFORMATDESCRIPTOR),
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&pfd))
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{
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@ -303,7 +255,7 @@ static int choosePixelFormat(_GLFWwindow* window,
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u->doublebuffer = GLFW_TRUE;
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}
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u->handle = n;
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u->handle = pixelFormat;
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usableCount++;
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}
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@ -332,6 +284,9 @@ static int choosePixelFormat(_GLFWwindow* window,
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return pixelFormat;
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}
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#undef addAttrib
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#undef findAttribValue
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static void makeContextCurrentWGL(_GLFWwindow* window)
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{
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if (window)
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