2015-04-15 01:32:24 -06:00
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/*
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* Copyright © 2013 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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/**
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* @file wgl_per_context_funcptrs.c
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*
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* Tests that epoxy works correctly when wglGetProcAddress() returns
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* different function pointers for different contexts.
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*
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* wgl allows that to be the case when the device or pixel format are
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* different. We don't know if the underlying implementation actually
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* *will* return different function pointers, so force the issue by
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* overriding wglGetProcAddress() to return our function pointers with
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* magic behavior. This way we can test epoxy's implementation
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* regardless.
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*/
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#include <stdio.h>
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#include <assert.h>
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#include "wgl_common.h"
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#include <epoxy/gl.h>
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#define CREATESHADER_CTX1_VAL 1001
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#define CREATESHADER_CTX2_VAL 1002
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static HGLRC ctx1, ctx2, current_context;
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static bool pass = true;
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2015-08-19 20:49:44 -06:00
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#define OVERRIDE_API(type) __declspec(dllexport) type __stdcall
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2015-04-15 01:32:24 -06:00
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2015-08-19 20:49:44 -06:00
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OVERRIDE_API (GLuint) override_glCreateShader_ctx1(GLenum target);
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OVERRIDE_API (GLuint) override_glCreateShader_ctx2(GLenum target);
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OVERRIDE_API (PROC) override_wglGetProcAddress(LPCSTR name);
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2015-04-15 01:32:24 -06:00
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2015-08-19 20:49:44 -06:00
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OVERRIDE_API (GLuint)
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2015-04-15 01:32:24 -06:00
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override_glCreateShader_ctx1(GLenum target)
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{
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if (current_context != ctx1) {
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2018-05-25 00:24:59 -06:00
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fputs("ctx1 called while other context current\n", stderr);
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2015-04-15 01:32:24 -06:00
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pass = false;
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}
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return CREATESHADER_CTX1_VAL;
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}
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2015-08-19 20:49:44 -06:00
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OVERRIDE_API (GLuint)
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2015-04-15 01:32:24 -06:00
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override_glCreateShader_ctx2(GLenum target)
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{
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if (current_context != ctx2) {
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2018-05-25 00:24:59 -06:00
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fputs("ctx2 called while other context current\n", stderr);
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2015-04-15 01:32:24 -06:00
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pass = false;
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}
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return CREATESHADER_CTX2_VAL;
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}
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2015-08-19 20:49:44 -06:00
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OVERRIDE_API (PROC)
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2015-04-15 01:32:24 -06:00
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override_wglGetProcAddress(LPCSTR name)
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{
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assert(strcmp(name, "glCreateShader") == 0);
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if (current_context == ctx1) {
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return (PROC)override_glCreateShader_ctx1;
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} else {
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assert(current_context == ctx2);
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return (PROC)override_glCreateShader_ctx2;
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}
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}
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static void
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test_createshader(HDC hdc, HGLRC ctx)
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{
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GLuint shader, expected;
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int ctxnum;
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wglMakeCurrent(hdc, ctx);
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current_context = ctx;
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/* Install our GPA override so we can force per-context function
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* pointers.
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*/
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wglGetProcAddress = override_wglGetProcAddress;
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if (ctx == ctx1) {
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expected = CREATESHADER_CTX1_VAL;
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ctxnum = 1;
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} else {
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assert(ctx == ctx2);
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expected = CREATESHADER_CTX2_VAL;
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ctxnum = 2;
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}
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shader = glCreateShader(GL_FRAGMENT_SHADER);
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printf("ctx%d: Returned %d\n", ctxnum, shader);
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if (shader != expected) {
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fprintf(stderr, " expected %d\n", expected);
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pass = false;
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}
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}
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static int
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test_function(HDC hdc)
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{
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ctx1 = wglCreateContext(hdc);
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ctx2 = wglCreateContext(hdc);
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if (!ctx1 || !ctx2) {
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2018-05-25 00:24:59 -06:00
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fputs("Failed to create wgl contexts\n", stderr);
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2015-04-15 01:32:24 -06:00
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return 1;
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}
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if (!wglMakeCurrent(hdc, ctx1)) {
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fputs("Failed to make context current\n", stderr);
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2015-04-15 01:32:24 -06:00
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return 1;
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}
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if (epoxy_gl_version() < 20) {
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/* We could possibly do a 1.3 entrypoint or something instead. */
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2018-05-25 00:24:59 -06:00
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fputs("Test relies on overriding a GL 2.0 entrypoint\n", stderr);
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2015-04-15 01:32:24 -06:00
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return 77;
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}
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/* Force resolving epoxy_wglGetProcAddress. */
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wglGetProcAddress("glCreateShader");
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test_createshader(hdc, ctx1);
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test_createshader(hdc, ctx1);
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test_createshader(hdc, ctx2);
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test_createshader(hdc, ctx2);
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test_createshader(hdc, ctx1);
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test_createshader(hdc, ctx2);
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wglMakeCurrent(NULL, NULL);
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wglDeleteContext(ctx1);
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wglDeleteContext(ctx2);
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return !pass;
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}
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int
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main(int argc, char **argv)
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{
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make_window_and_test(test_function);
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/* UNREACHED */
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return 1;
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}
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