Cycles OpenGL: Don't use full matrix transform when we can just use

simple addition.

2 files changed, 8 insertions, 18 deletions

diff --git a/intern/cycles/device/device.cpp b/intern/cycles/device/device.cpp
index 3a33b8fb68b..839f35116fa 100644
--- a/intern/cycles/device/device.cpp
+++ b/intern/cycles/device/device.cpp
@@ -83,24 +83,19 @@ void Device::draw_pixels(device_memory& rgba, int y, int w, int h, int dy, int w
 			draw_params.bind_display_space_shader_cb();
 		}
 
-		glPushMatrix();
-		glTranslatef(0.0f, (float)dy, 0.0f);
-
 		glBegin(GL_QUADS);
 		
 		glTexCoord2f(0.0f, 0.0f);
-		glVertex2f(0.0f, 0.0f);
+		glVertex2f(0.0f, dy);
 		glTexCoord2f(1.0f, 0.0f);
-		glVertex2f((float)width, 0.0f);
+		glVertex2f((float)width, dy);
 		glTexCoord2f(1.0f, 1.0f);
-		glVertex2f((float)width, (float)height);
+		glVertex2f((float)width, (float)height + dy);
 		glTexCoord2f(0.0f, 1.0f);
-		glVertex2f(0.0f, (float)height);
+		glVertex2f(0.0f, (float)height + dy);
 
 		glEnd();
 
-		glPopMatrix();
-
 		if(draw_params.unbind_display_space_shader_cb) {
 			draw_params.unbind_display_space_shader_cb();
 		}
diff --git a/intern/cycles/device/device_cuda.cpp b/intern/cycles/device/device_cuda.cpp
index 04319ba4775..42d4f8e48ff 100644
--- a/intern/cycles/device/device_cuda.cpp
+++ b/intern/cycles/device/device_cuda.cpp
@@ -918,24 +918,19 @@ public:
 				draw_params.bind_display_space_shader_cb();
 			}
 
-			glPushMatrix();
-			glTranslatef(0.0f, (float)dy, 0.0f);
-				
 			glBegin(GL_QUADS);
 			
 			glTexCoord2f(0.0f, 0.0f);
-			glVertex2f(0.0f, 0.0f);
+			glVertex2f(0.0f, dy);
 			glTexCoord2f((float)w/(float)pmem.w, 0.0f);
-			glVertex2f((float)width, 0.0f);
+			glVertex2f((float)width, dy);
 			glTexCoord2f((float)w/(float)pmem.w, (float)h/(float)pmem.h);
-			glVertex2f((float)width, (float)height);
+			glVertex2f((float)width, (float)height + dy);
 			glTexCoord2f(0.0f, (float)h/(float)pmem.h);
-			glVertex2f(0.0f, (float)height);
+			glVertex2f(0.0f, (float)height + dy);
 
 			glEnd();
 
-			glPopMatrix();
-
 			if(draw_params.unbind_display_space_shader_cb) {
 				draw_params.unbind_display_space_shader_cb();
 			}