mirror of
https://github.com/n64dev/cen64.git
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8b89df2fdc
Replaced all references to simulation with emulation Updated copyright year Updated .gitignore to reduce chances of random files being uploaded to the repo Added .gitattributes to normalize all text files, and to ignore binary files (which includes the logo and the NEC PDF)
102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
//
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// os/winapi/gl_config.c: WinAPI/OpenGL framebuffer configuration.
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//
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// CEN64: Cycle-Accurate Nintendo 64 Emulator.
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// Copyright (C) 2015, Tyler J. Stachecki.
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//
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// This file is subject to the terms and conditions defined in
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// 'LICENSE', which is part of this source code package.
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//
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#include "common.h"
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#include "gl_common.h"
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#include "gl_config.h"
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#include "gl_hints.h"
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <windows.h>
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//
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// Creates a matching cen64_gl_config from a cen64_gl_hints struct.
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//
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// On error, CEN64_GL_CONFIG_BAD is returned.
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//
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cen64_gl_config *cen64_gl_config_create(cen64_gl_display display,
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cen64_gl_screen screen, const cen64_gl_hints *hints, int *matching) {
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struct cen64_gl_config *config;
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PIXELFORMATDESCRIPTOR pfd;
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// Do *NOT* use this hDC HANDLE outside this function.
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// It is the desktop window's hDC, and we shouldn't mess
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// with it. The only thing it's used for is to match a
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// PIXELFORMATDESCRIPTOR and expose success/failure.
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HDC screen_hdc;
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if ((config = malloc(sizeof(*config))) == NULL)
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return CEN64_GL_CONFIG_BAD;
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if ((screen_hdc = GetDC(screen)) == NULL) {
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free(config);
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return CEN64_GL_CONFIG_BAD;
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}
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memset(&pfd, 0, sizeof(pfd));
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pfd.nSize = sizeof(pfd);
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// As of 04/25/15, the MSDN documention (still) just says
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// to set this field to 1. So, uh, let's go with that.
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pfd.nVersion = 1;
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// Pack the structure using the provided hints->
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pfd.dwFlags = PFD_SUPPORT_OPENGL;
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pfd.iLayerType = PFD_MAIN_PLANE;
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pfd.iPixelType |= (enum cen64_gl_context_type) hints->context_type;
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pfd.dwFlags |= (enum cen64_gl_drawable_type) hints->drawable_type;
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if (hints->double_buffered != -1)
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pfd.dwFlags |= PFD_DOUBLEBUFFER;
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if (hints->stereoscopic != -1)
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pfd.dwFlags |= PFD_STEREO;
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if (hints->rgb_color_depth != -1)
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pfd.cColorBits = hints->rgb_color_depth;
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if (hints->alpha_color_depth != -1)
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pfd.cAlphaBits = hints->alpha_color_depth;
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if (hints->depth_buffer_size != -1)
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pfd.cDepthBits = hints->depth_buffer_size;
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if (hints->num_aux_buffers != -1)
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pfd.cAuxBuffers = hints->num_aux_buffers;
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if (hints->stencil_buffer_size != -1)
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pfd.cStencilBits = hints->stencil_buffer_size;
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if (hints->accum_buffer_red_bits != -1)
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pfd.cAccumRedBits = hints->accum_buffer_red_bits;
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if (hints->accum_buffer_green_bits != -1)
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pfd.cAccumGreenBits = hints->accum_buffer_green_bits;
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if (hints->accum_buffer_blue_bits != -1)
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pfd.cAccumBlueBits = hints->accum_buffer_blue_bits;
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if (hints->accum_buffer_alpha_bits != -1)
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pfd.cAccumAlphaBits = hints->accum_buffer_alpha_bits;
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config->pixel_format = ChoosePixelFormat(screen_hdc, &pfd);
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DescribePixelFormat(screen_hdc, config->pixel_format,
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sizeof(config->pfd), &config->pfd);
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ReleaseDC(screen, screen_hdc);
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*matching = 1;
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return config;
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}
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