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-rw-r--r--src/mesa/main/version.c216
1 files changed, 216 insertions, 0 deletions
diff --git a/src/mesa/main/version.c b/src/mesa/main/version.c
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+++ b/src/mesa/main/version.c
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+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 2010 VMware, Inc. All Rights Reserved.
+ *
+ * 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 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 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.
+ */
+
+
+#include "context.h"
+#include "version.h"
+
+
+
+/**
+ * Examine enabled GL extensions to determine GL version.
+ * Return major and minor version numbers.
+ */
+static void
+compute_version(GLcontext *ctx)
+{
+ GLuint major, minor;
+ static const int max = 100;
+
+ const GLboolean ver_1_3 = (ctx->Extensions.ARB_multisample &&
+ ctx->Extensions.ARB_multitexture &&
+ ctx->Extensions.ARB_texture_border_clamp &&
+ ctx->Extensions.ARB_texture_compression &&
+ ctx->Extensions.ARB_texture_cube_map &&
+ ctx->Extensions.EXT_texture_env_add &&
+ ctx->Extensions.ARB_texture_env_combine &&
+ ctx->Extensions.ARB_texture_env_dot3);
+ const GLboolean ver_1_4 = (ver_1_3 &&
+ ctx->Extensions.ARB_depth_texture &&
+ ctx->Extensions.ARB_shadow &&
+ ctx->Extensions.ARB_texture_env_crossbar &&
+ ctx->Extensions.ARB_texture_mirrored_repeat &&
+ ctx->Extensions.ARB_window_pos &&
+ ctx->Extensions.EXT_blend_color &&
+ ctx->Extensions.EXT_blend_func_separate &&
+ ctx->Extensions.EXT_blend_minmax &&
+ ctx->Extensions.EXT_blend_subtract &&
+ ctx->Extensions.EXT_fog_coord &&
+ ctx->Extensions.EXT_multi_draw_arrays &&
+ ctx->Extensions.EXT_point_parameters &&
+ ctx->Extensions.EXT_secondary_color &&
+ ctx->Extensions.EXT_stencil_wrap &&
+ ctx->Extensions.EXT_texture_lod_bias &&
+ ctx->Extensions.SGIS_generate_mipmap);
+ const GLboolean ver_1_5 = (ver_1_4 &&
+ ctx->Extensions.ARB_occlusion_query &&
+ ctx->Extensions.ARB_vertex_buffer_object &&
+ ctx->Extensions.EXT_shadow_funcs);
+ const GLboolean ver_2_0 = (ver_1_5 &&
+ ctx->Extensions.ARB_draw_buffers &&
+ ctx->Extensions.ARB_point_sprite &&
+ ctx->Extensions.ARB_shader_objects &&
+ ctx->Extensions.ARB_vertex_shader &&
+ ctx->Extensions.ARB_fragment_shader &&
+ ctx->Extensions.ARB_texture_non_power_of_two &&
+ ctx->Extensions.EXT_blend_equation_separate &&
+
+ /* Technically, 2.0 requires the functionality
+ * of the EXT version. Enable 2.0 if either
+ * extension is available, and assume that a
+ * driver that only exposes the ATI extension
+ * will fallback to software when necessary.
+ */
+ (ctx->Extensions.EXT_stencil_two_side
+ || ctx->Extensions.ATI_separate_stencil));
+ const GLboolean ver_2_1 = (ver_2_0 &&
+ ctx->Extensions.ARB_shading_language_120 &&
+ ctx->Extensions.EXT_pixel_buffer_object &&
+ ctx->Extensions.EXT_texture_sRGB);
+ if (ver_2_1) {
+ major = 2;
+ minor = 1;
+ }
+ else if (ver_2_0) {
+ major = 2;
+ minor = 0;
+ }
+ else if (ver_1_5) {
+ major = 1;
+ minor = 5;
+ }
+ else if (ver_1_4) {
+ major = 1;
+ minor = 4;
+ }
+ else if (ver_1_3) {
+ major = 1;
+ minor = 3;
+ }
+ else {
+ major = 1;
+ minor = 2;
+ }
+
+ ctx->VersionMajor = major;
+ ctx->VersionMinor = minor;
+ ctx->VersionString = (char *) malloc(max);
+ if (ctx->VersionString) {
+ _mesa_snprintf(ctx->VersionString, max,
+ "%u.%u Mesa " MESA_VERSION_STRING,
+ ctx->VersionMajor, ctx->VersionMinor);
+ }
+}
+
+static void
+compute_version_es1(GLcontext *ctx)
+{
+ static const int max = 100;
+
+ /* OpenGL ES 1.0 is derived from OpenGL 1.3 */
+ const GLboolean ver_1_0 = (ctx->Extensions.ARB_multisample &&
+ ctx->Extensions.ARB_multitexture &&
+ ctx->Extensions.ARB_texture_compression &&
+ ctx->Extensions.EXT_texture_env_add &&
+ ctx->Extensions.ARB_texture_env_combine &&
+ ctx->Extensions.ARB_texture_env_dot3);
+ /* OpenGL ES 1.1 is derived from OpenGL 1.5 */
+ const GLboolean ver_1_1 = (ver_1_0 &&
+ ctx->Extensions.EXT_point_parameters &&
+ ctx->Extensions.SGIS_generate_mipmap &&
+ ctx->Extensions.ARB_vertex_buffer_object);
+
+ if (ver_1_1) {
+ ctx->VersionMajor = 1;
+ ctx->VersionMinor = 1;
+ } else if (ver_1_0) {
+ ctx->VersionMajor = 1;
+ ctx->VersionMinor = 0;
+ } else {
+ _mesa_problem(ctx, "Incomplete OpenGL ES 1.0 support.");
+ }
+
+ ctx->VersionString = (char *) malloc(max);
+ if (ctx->VersionString) {
+ _mesa_snprintf(ctx->VersionString, max,
+ "OpenGL ES-CM 1.%d Mesa " MESA_VERSION_STRING,
+ ctx->VersionMinor);
+ }
+}
+
+static void
+compute_version_es2(GLcontext *ctx)
+{
+ static const int max = 100;
+
+ /* OpenGL ES 2.0 is derived from OpenGL 2.0 */
+ const GLboolean ver_2_0 = (ctx->Extensions.ARB_multisample &&
+ ctx->Extensions.ARB_multitexture &&
+ ctx->Extensions.ARB_texture_compression &&
+ ctx->Extensions.ARB_texture_cube_map &&
+ ctx->Extensions.ARB_texture_mirrored_repeat &&
+ ctx->Extensions.EXT_blend_color &&
+ ctx->Extensions.EXT_blend_func_separate &&
+ ctx->Extensions.EXT_blend_minmax &&
+ ctx->Extensions.EXT_blend_subtract &&
+ ctx->Extensions.EXT_stencil_wrap &&
+ ctx->Extensions.ARB_vertex_buffer_object &&
+ ctx->Extensions.ARB_shader_objects &&
+ ctx->Extensions.ARB_vertex_shader &&
+ ctx->Extensions.ARB_fragment_shader &&
+ ctx->Extensions.ARB_texture_non_power_of_two &&
+ ctx->Extensions.EXT_blend_equation_separate);
+ if (ver_2_0) {
+ ctx->VersionMajor = 2;
+ ctx->VersionMinor = 0;
+ } else {
+ _mesa_problem(ctx, "Incomplete OpenGL ES 2.0 support.");
+ }
+
+ ctx->VersionString = (char *) malloc(max);
+ if (ctx->VersionString) {
+ _mesa_snprintf(ctx->VersionString, max,
+ "OpenGL ES 2.0 Mesa " MESA_VERSION_STRING);
+ }
+}
+
+/**
+ * Set the context's VersionMajor, VersionMinor, VersionString fields.
+ * This should only be called once as part of context initialization.
+ */
+void
+_mesa_compute_version(GLcontext *ctx)
+{
+ switch (ctx->API) {
+ case API_OPENGL:
+ compute_version(ctx);
+ break;
+ case API_OPENGLES:
+ compute_version_es1(ctx);
+ break;
+ case API_OPENGLES2:
+ compute_version_es2(ctx);
+ break;
+ }
+
+}
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