update OSMesa

Author: ColleagueRiley

Makefile

@@ -2,6 +2,7 @@
 # RGFW_WAYLAND=1 -> use wayland 
 # NO_VULKAN=1 -> do not compile the vulkan example
 # NO_GLES=1 -> do not compile the gles example (on by default for non-linux OSes)
+# NO_OSMESA=1 -> do not compile the osmesa example (on by default for non-linux OSes)
 
 CC = gcc
 AR = ar
@@ -23,6 +24,7 @@ WARNINGS =  -Wall -Wstrict-prototypes -Wextra -Wstrict-prototypes -Wold-style-de
 OS_DIR = \\
 
 NO_GLES = 1
+NO_OSMESA = 1
 detected_OS = windows
 
 OBJ_FILE = .o
@@ -46,6 +48,7 @@ ifeq (,$(filter $(CC),x86_64-w64-mingw32-gcc i686-w64-mingw32-gcc x86_64-w64-min
 		LIB_EXT = .so
 		OS_DIR = /
 		NO_GLES = 0
+		NO_OSMESA = 0
 	endif
 else
 	OS_DIR = /
@@ -79,6 +82,8 @@ else ifneq ($(CC),g++)
 	LIBS += -std=c99
 endif
 
+LIBS += -lOSMesa
+
 EXAMPLE_OUTPUTS = \
     examples/basic/basic \
 	examples/gamepad/gamepad \
@@ -93,6 +98,7 @@ EXAMPLE_OUTPUTS_CUSTOM = \
 	examples/gl33/gl33 \
 	examples/portableGL/pgl \
 	examples/gles2/gles2 \
+	examples/osmesa/osmesa \
 	examples/vk10/vk10 \
 	examples/dx11/dx11 \
 	examples/metal/metal \
@@ -116,6 +122,13 @@ else
 	@echo gles has been disabled
 endif
 
+examples/osmesa/osmesa: examples/osmesa/osmesa.c RGFW.h
+ifneq ($(NO_GLES), 1)
+	$(CC)  $(CFLAGS) -I. $< $(LIBS) $(LINK_GL2) -lOSMesa -o $@$(EXT)
+else
+	@echo gles has been disabled
+endif
+
 examples/vk10/vk10: examples/vk10/vk10.c RGFW.h
 ifneq ($(NO_VULKAN), 1)
 	glslangValidator -V examples/vk10/shaders/vert.vert -o examples/vk10/shaders/vert.h --vn vert_code
@@ -174,6 +187,9 @@ debug: all
 ifneq ($(NO_GLES), 1)
 		./examples/gles2/gles2$(EXT)
 endif
+ifneq ($(NO_OSMESA), 1)
+		./examples/gles2/gles2$(EXT)
+endif
 ifneq ($(NO_VULKAN), 1)
 		./examples/vk10/vk10$(EXT)
 endif

RGFW.h

@@ -2242,6 +2242,7 @@ RGFWDEF void RGFW_OSMesa_reorganize(RGFW_window* win);
 
 /* reorganize buffer for osmesa */
 void RGFW_OSMesa_reorganize(RGFW_window* win) {
+	return;
 	u8* row = (u8*) RGFW_MALLOC(RGFW_bufferSize.w * 3);
 
 	i32 half_height = RGFW_bufferSize.h / 2;
@@ -2485,8 +2486,8 @@ void RGFW_init_buffer(RGFW_window* win, XVisualInfo* vi) {
 	#endif
 
 	#ifdef RGFW_OSMESA
-			win->src.ctx = OSMesaCreateContext(OSMESA_RGBA, NULL);
-			OSMesaMakeCurrent(win->src.ctx, win->buffer, GL_UNSIGNED_BYTE, win->r.w, win->r.h);
+			win->src.ctx = OSMesaCreateContext(OSMESA_BGRA, NULL);
+			OSMesaMakeCurrent(win->src.ctx, win->buffer, GL_UNSIGNED_BYTE, RGFW_bufferSize.w, RGFW_bufferSize.h);
 	#endif
 
 	win->src.bitmap = XCreateImage(
@@ -3990,8 +3991,8 @@ void RGFW_window_swapBuffers(RGFW_window* win) {
 			RGFW_OSMesa_reorganize(win);
 			#endif
 
-			#ifndef RGFW_X11_DONT_CONVERT_BGR
-				win->src.bitmap->data = (char*) win->buffer;
+			win->src.bitmap->data = (char*) win->buffer;
+			#if !defined(RGFW_X11_DONT_CONVERT_BGR) && !defined(RGFW_OSMESA)
 				u32 x, y;
 				for (y = 0; y < (u32)win->r.h; y++) {
 					for (x = 0; x < (u32)win->r.w; x++) {