allow renderpasses to specify a clear mode and pipelines to specify their viewport and scissor

1 files changed, 44 insertions, 1 deletions

diff --git a/pipeline.cpp b/pipeline.cpp
index 89f606d..b0a88eb 100644
--- a/pipeline.cpp
+++ b/pipeline.cpp
@@ -20,6 +20,13 @@ void Pipeline_Builder::begin_rp() {
 void Pipeline_Builder::rp_target(Texture_Id id, Colour clear) {
 	pass->target = id;
 	pass->clear = clear;
+	pass->mode = Clear_Mode::clear;
+}
+
+void Pipeline_Builder::rp_target(Texture_Id id, Clear_Mode clear) {
+	pass->target = id;
+	assert(clear != Clear_Mode::clear);
+	pass->mode = clear;
 }
 
 void Pipeline_Builder::validate_rp() {
@@ -31,9 +38,45 @@ Render_Pass& Pipeline_Builder::build_rp() {
 	return *pass;
 }
 
-void Pipeline_Builder::begin() {
+void Pipeline_Builder::begin(Device* dev) {
 	pip = (Pipeline*)arena_alloc(arena, sizeof *pip);
 	memset(pip, 0, sizeof *pip);
+	if (dev) {
+		Texture_Id backbuffer_id = dev->get_backbuffer();
+		Texture& backbuffer = dev->get_texture(backbuffer_id);
+		pip->scissor[0] = 0;
+		pip->scissor[1] = 0;
+		pip->scissor[2] = backbuffer.w;
+		pip->scissor[3] = backbuffer.h;
+		pip->viewport[0] = 0;
+		pip->viewport[1] = 0;
+		pip->viewport[2] = backbuffer.w;
+		pip->viewport[3] = backbuffer.h;
+	}
+}
+
+void Pipeline_Builder::viewport(
+	float x,
+	float y,
+	float w,
+	float h
+) {
+	pip->viewport[0] = x;
+	pip->viewport[1] = y;
+	pip->viewport[2] = w;
+	pip->viewport[3] = h;
+}
+
+void Pipeline_Builder::scissor(
+	float x,
+	float y,
+	float w,
+	float h
+) {
+	pip->scissor[0] = x;
+	pip->scissor[1] = y;
+	pip->scissor[2] = w;
+	pip->scissor[3] = h;
 }
 
 void Pipeline_Builder::shader(Shader_Id s) {