read depth fixes

1 files changed, 70 insertions, 5 deletions

diff --git a/drivers/gles2/rasterizer_gles2.cpp b/drivers/gles2/rasterizer_gles2.cpp
index d2bf28a1bc..ae5f3d8f2f 100644
--- a/drivers/gles2/rasterizer_gles2.cpp
+++ b/drivers/gles2/rasterizer_gles2.cpp
@@ -8559,6 +8559,7 @@ RID RasterizerGLES2::canvas_light_shadow_buffer_create(int p_width) {
 #ifdef GLEW_ENABLED
 		glDrawBuffer(GL_NONE);
 #endif
+
 	} else {
 		// We'll use a RGBA texture into which we pack the depth info
 		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, cls->size, cls->height, 0,
@@ -8567,6 +8568,7 @@ RID RasterizerGLES2::canvas_light_shadow_buffer_create(int p_width) {
 		// Attach the RGBA texture to FBO color attachment point
 		glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
 				       GL_TEXTURE_2D, cls->depth, 0);
+		cls->rgba=cls->depth;
 
 		// Allocate 16-bit depth buffer
 		glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, cls->size, cls->height);
@@ -8845,10 +8847,14 @@ void RasterizerGLES2::canvas_debug_viewport_shadows(CanvasLight* p_lights_with_s
 	int h = 10;
 	int w = viewport.width;
 	int ofs = h;
+
+	//print_line(" debug lights ");
 	while(light) {
 
+	//	print_line("debug light");
 		if (light->shadow_buffer.is_valid()) {
 
+	//		print_line("sb is valid");
 			CanvasLightShadow * sb = canvas_light_shadow_owner.get(light->shadow_buffer);
 			if (sb) {
 				glActiveTexture(GL_TEXTURE0);
@@ -9858,9 +9864,9 @@ void RasterizerGLES2::free(const RID& p_rid) {
 		glDeleteFramebuffers(1,&cls->fbo);
 		glDeleteRenderbuffers(1,&cls->rbo);
 		glDeleteTextures(1,&cls->depth);
-		if (!read_depth_supported) {
-			glDeleteTextures(1,&cls->rgba);
-		}
+		//if (!read_depth_supported) {
+		//	glDeleteTextures(1,&cls->rgba);
+		//}
 
 		canvas_light_shadow_owner.free(p_rid);
 		memdelete(cls);
@@ -10366,6 +10372,62 @@ void RasterizerGLES2::_update_blur_buffer() {
 
 }
 #endif
+
+
+bool RasterizerGLES2::_test_depth_shadow_buffer() {
+
+
+	int size=16;
+
+	GLuint fbo;
+	GLuint rbo;
+	GLuint depth;
+
+	glActiveTexture(GL_TEXTURE0);
+
+	glGenFramebuffers(1, &fbo);
+	glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+
+	// Create a render buffer
+	glGenRenderbuffers(1, &rbo);
+	glBindRenderbuffer(GL_RENDERBUFFER, rbo);
+
+	// Create a texture for storing the depth
+	glGenTextures(1, &depth);
+	glBindTexture(GL_TEXTURE_2D, depth);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+	// Remove artifact on the edges of the shadowmap
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+
+
+	// We'll use a depth texture to store the depths in the shadow map
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, size, size, 0,
+		     GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, NULL);
+
+#ifdef GLEW_ENABLED
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+#endif
+
+	// Attach the depth texture to FBO depth attachment point
+	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
+			       GL_TEXTURE_2D, depth, 0);
+
+
+	GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
+
+	glDeleteFramebuffers(1,&fbo);
+	glDeleteRenderbuffers(1,&rbo);
+	glDeleteTextures(1,&depth);
+
+	return status == GL_FRAMEBUFFER_COMPLETE;
+
+}
+
 void RasterizerGLES2::init() {
 
 #ifdef GLEW_ENABLED
@@ -10438,7 +10500,7 @@ void RasterizerGLES2::init() {
 
 #ifdef GLEW_ENABLED
 
-	read_depth_supported=true;
+
 	pvr_supported=false;
 	etc_supported=false;
 	use_depth24 =true;
@@ -10456,7 +10518,10 @@ void RasterizerGLES2::init() {
 	use_anisotropic_filter=true;
 	float_linear_supported=true;
 	float_supported=true;
-	use_rgba_shadowmaps=false;
+
+	read_depth_supported=_test_depth_shadow_buffer();
+	use_rgba_shadowmaps=!read_depth_supported;
+	//print_line("read depth support? "+itos(read_depth_supported));
 
 	glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT,&anisotropic_level);
 	anisotropic_level=MIN(anisotropic_level,float(GLOBAL_DEF("rasterizer/anisotropic_filter_level",4.0)));