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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)
127 lines
3.6 KiB
C
127 lines
3.6 KiB
C
//
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// os/x11/gl_config.c: X11/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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//
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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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int idx = 0;
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// Magic number was chosen based on the glXChooseFBConfig man page.
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// It is at least large enough to hold the supported attributes, as
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// well as a few additional ones. Expand it at your convenience.
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int attribute_list[64];
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// Build the attributes list using the provided hints.
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attribute_list[idx++] = GLX_X_RENDERABLE;
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attribute_list[idx++] = True;
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attribute_list[idx++] = GLX_X_VISUAL_TYPE;
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attribute_list[idx++] = GLX_TRUE_COLOR;
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attribute_list[idx++] = GLX_RENDER_TYPE;
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attribute_list[idx++] = hints->context_type;
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attribute_list[idx++] = GLX_DRAWABLE_TYPE;
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attribute_list[idx++] = hints->drawable_type;
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if (hints->double_buffered != -1) {
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attribute_list[idx++] = GLX_DOUBLEBUFFER;
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attribute_list[idx++] = hints->double_buffered ? True : False;
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}
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if (hints->stereoscopic != -1) {
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attribute_list[idx++] = GLX_STEREO;
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attribute_list[idx++] = hints->stereoscopic ? True : False;
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}
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if (hints->rgb_color_depth != -1) {
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int component_depth = hints->rgb_color_depth > 0
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? hints->rgb_color_depth / 3
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: 0;
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attribute_list[idx++] = GLX_RED_SIZE;
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attribute_list[idx++] = component_depth;
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attribute_list[idx++] = GLX_GREEN_SIZE;
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attribute_list[idx++] = component_depth;
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attribute_list[idx++] = GLX_BLUE_SIZE;
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attribute_list[idx++] = component_depth;
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}
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if (hints->alpha_color_depth != -1) {
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attribute_list[idx++] = GLX_ALPHA_SIZE;
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attribute_list[idx++] = hints->alpha_color_depth;
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}
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if (hints->depth_buffer_size != -1) {
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attribute_list[idx++] = GLX_DEPTH_SIZE;
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attribute_list[idx++] = hints->depth_buffer_size;
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}
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if (hints->num_aux_buffers != -1) {
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attribute_list[idx++] = GLX_AUX_BUFFERS;
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attribute_list[idx++] = hints->num_aux_buffers;
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}
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if (hints->stencil_buffer_size != -1) {
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attribute_list[idx++] = GLX_STENCIL_SIZE;
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attribute_list[idx++] = hints->stencil_buffer_size;
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}
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if (hints->accum_buffer_red_bits != -1) {
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attribute_list[idx++] = GLX_ACCUM_RED_SIZE;
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attribute_list[idx++] = hints->accum_buffer_red_bits;
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}
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if (hints->accum_buffer_green_bits != -1) {
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attribute_list[idx++] = GLX_ACCUM_GREEN_SIZE;
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attribute_list[idx++] = hints->accum_buffer_green_bits;
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}
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if (hints->accum_buffer_blue_bits != -1) {
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attribute_list[idx++] = GLX_ACCUM_BLUE_SIZE;
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attribute_list[idx++] = hints->accum_buffer_blue_bits;
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}
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if (hints->accum_buffer_alpha_bits != -1) {
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attribute_list[idx++] = GLX_ACCUM_ALPHA_SIZE;
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attribute_list[idx++] = hints->accum_buffer_alpha_bits;
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}
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// Terminate the list, as required by X11.
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attribute_list[idx++] = None;
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return glXChooseFBConfig(display, screen, attribute_list, matching);
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}
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//
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// Fetches an attribute from the cen64_gl_config object.
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//
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int cen64_gl_config_fetch_attribute(cen64_gl_display display,
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cen64_gl_config *config, int what) {
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int value, status;
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status = glXGetFBConfigAttrib(display, *config, what, &value);
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if (status == GLX_NO_EXTENSION || status == GLX_BAD_ATTRIBUTE)
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return -1;
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return value;
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}
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