Fix #19669 and other: triple buffer & icon texture drawing could cause

a system crash and other issues on ATI/Apple, due to a buggy driver
(similar issues reported for other OpenGL applications). For now, work
around it by not using non-power-of-two textures on this combination.

source/blender/editors/interface/interface_icons.c

@@ -489,7 +489,7 @@ static void init_internal_icons()
 		}
 
 		/* we only use a texture for cards with non-power of two */
-		if(GLEW_ARB_texture_non_power_of_two) {
+		if(GPU_non_power_of_two_support()) {
 			glGenTextures(1, &icongltex.id);
 
 			if(icongltex.id) {

source/blender/editors/space_view3d/drawobject.c

@@ -212,7 +212,7 @@ static void view3d_project_short_noclip(ARegion *ar, float *vec, short *adr)
 
 int draw_glsl_material(Scene *scene, Object *ob, View3D *v3d, int dt)
 {
-	if(!GPU_extensions_minimum_support())
+	if(!GPU_glsl_support())
 		return 0;
 	if(G.f & G_PICKSEL)
 		return 0;

source/blender/editors/space_view3d/drawvolume.c

@@ -349,7 +349,7 @@ void draw_volume(Scene *scene, ARegion *ar, View3D *v3d, Base *base, GPUTexture
 	else
 		printf("No volume shadow\n");
 
-	if (!GLEW_ARB_texture_non_power_of_two) {
+	if (!GPU_non_power_of_two_support()) {
 		cor[0] = (float)res[0]/(float)larger_pow2(res[0]);
 		cor[1] = (float)res[1]/(float)larger_pow2(res[1]);
 		cor[2] = (float)res[2]/(float)larger_pow2(res[2]);

source/blender/gpu/GPU_extensions.h

@@ -54,7 +54,8 @@ typedef struct GPUShader GPUShader;
 void GPU_extensions_disable(void);
 void GPU_extensions_init(void); /* call this before running any of the functions below */
 void GPU_extensions_exit(void);
-int GPU_extensions_minimum_support(void);
+int GPU_glsl_support(void);
+int GPU_non_power_of_two_support(void);
 int GPU_print_error(char *str);
 
 /* GPU Texture

source/blender/gpu/intern/gpu_extensions.c

@@ -69,7 +69,7 @@
 static struct GPUGlobal {
 	GLint maxtextures;
 	GLuint currentfb;
-	int minimumsupport;
+	int glslsupport;
 	int extdisabled;
 } GG = {1, 0, 0, 0};
 
@@ -87,15 +87,27 @@ void GPU_extensions_init()
 	if (GLEW_ARB_multitexture)
 		glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS_ARB, &GG.maxtextures);
 
-	GG.minimumsupport = 1;
+	GG.glslsupport = 1;
-	if (!GLEW_ARB_multitexture) GG.minimumsupport = 0;
+	if (!GLEW_ARB_multitexture) GG.glslsupport = 0;
-	if (!GLEW_ARB_vertex_shader) GG.minimumsupport = 0;
+	if (!GLEW_ARB_vertex_shader) GG.glslsupport = 0;
-	if (!GLEW_ARB_fragment_shader) GG.minimumsupport = 0;
+	if (!GLEW_ARB_fragment_shader) GG.glslsupport = 0;
 }
 
-int GPU_extensions_minimum_support()
+int GPU_glsl_support()
 {
-	return !GG.extdisabled && GG.minimumsupport;
+	return !GG.extdisabled && GG.glslsupport;
+}
+
+int GPU_non_power_of_two_support()
+{
+	/* Exception for buggy ATI/Apple driver in Mac OS X 10.5/10.6,
+	 * they claim to support this but can cause system freeze */
+#ifdef __APPLE__
+	if(strcmp(glGetString(GL_VENDOR), "ATI Technologies Inc.") == 0)
+		return 0;
+#endif
+
+	return GLEW_ARB_texture_non_power_of_two;
 }
 
 int GPU_print_error(char *str)
@@ -231,7 +243,7 @@ static GPUTexture *GPU_texture_create_nD(int w, int h, int n, float *fpixels, in
 		return NULL;
 	}
 
-	if (!GLEW_ARB_texture_non_power_of_two) {
+	if (!GPU_non_power_of_two_support()) {
 		tex->w = larger_pow2(tex->w);
 		tex->h = larger_pow2(tex->h);
 	}
@@ -337,7 +349,7 @@ GPUTexture *GPU_texture_create_3D(int w, int h, int depth, float *fpixels)
 		return NULL;
 	}
 
-	if (!GLEW_ARB_texture_non_power_of_two) {
+	if (!GPU_non_power_of_two_support()) {
 		tex->w = larger_pow2(tex->w);
 		tex->h = larger_pow2(tex->h);
 		tex->depth = larger_pow2(tex->depth);

source/blender/windowmanager/intern/wm_draw.c

@@ -376,7 +376,7 @@ static int wm_triple_gen_textures(wmWindow *win, wmDrawTriple *triple)
 		triple->x[0]= win->sizex;
 		triple->y[0]= win->sizey;
 	}
-	else if(GLEW_ARB_texture_non_power_of_two) {
+	else if(GPU_non_power_of_two_support()) {
 		triple->target= GL_TEXTURE_2D;
 		triple->nx= 1;
 		triple->ny= 1;

source/gameengine/BlenderRoutines/BL_KetsjiEmbedStart.cpp

@@ -356,7 +356,7 @@ extern "C" void StartKetsjiShell(struct bContext *C, struct ARegion *ar, int alw
 			if(GLEW_ARB_multitexture && GLEW_VERSION_1_1)
 				usemat = true;
 
-			if(GPU_extensions_minimum_support())
+			if(GPU_glsl_support())
 				useglslmat = true;
 			else if(blscene->gm.matmode == GAME_MAT_GLSL)
 				usemat = false;

source/gameengine/GamePlayer/ghost/GPG_Application.cpp

@@ -539,7 +539,7 @@ bool GPG_Application::initEngine(GHOST_IWindow* window, const int stereoMode)
 		if(GLEW_ARB_multitexture && GLEW_VERSION_1_1)
 			m_blendermat = (SYS_GetCommandLineInt(syshandle, "blender_material", 1) != 0);
 
-		if(GPU_extensions_minimum_support())
+		if(GPU_glsl_support())
 			m_blenderglslmat = (SYS_GetCommandLineInt(syshandle, "blender_glsl_material", 1) != 0);
 		else if(gm->matmode == GAME_MAT_GLSL)
 			m_blendermat = false;