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