First commit

1 files changed, 87 insertions, 0 deletions

diff --git a/themes/Renderer2d.cpp b/themes/Renderer2d.cpp
new file mode 100644
index 0000000..c51d4a9
--- /dev/null
+++ b/themes/Renderer2d.cpp
@@ -0,0 +1,87 @@
+#include "Renderer2d.h"
+#include "WebglContext.h"
+#include "mathlib.h"
+
+const char* renderer2dVertexShader = 
+"attribute vec2 position; \n"
+"attribute vec4 color; \n"
+"uniform mat4 projection; \n"
+"uniform mat4 model; \n"
+"varying lowp vec4 VertexColor; \n"
+"void main() { \n"
+"    vec4 fragmentPosition = projection * model * vec4(position, 1, 1); \n"
+"    gl_Position = fragmentPosition; \n"
+"    VertexColor = color; \n"
+"}";
+
+const char* renderer2dFragmentShader = 
+"varying lowp vec4 VertexColor; \n"
+"void main() { \n"
+"    gl_FragColor = VertexColor; \n"
+"}";
+
+void Renderer2d::load(WebglContext* context) {
+	printf("Compiling orthographic shader...\n");
+	shader = loadShader(renderer2dVertexShader, renderer2dFragmentShader);
+
+	useShader(shader);
+	attributes.position = getShaderAttribute(shader, "position");
+	attributes.color = getShaderAttribute(shader, "color");
+	uniforms.projection = getShaderUniform(shader, "projection");
+	uniforms.model = getShaderUniform(shader, "model");
+	projection = Mat4x4().getOrthographicMatrix(0, context->width, 0, context->height);
+
+	printf("Orthographic shader compiled.\n");
+}
+	
+void Renderer2d::render() {
+	glEnable(GL_DEPTH_TEST);
+	glDepthFunc(GL_LEQUAL);
+	glDepthMask(GL_TRUE);
+	glClearColor(0.f, 0.f, 0.f, 1.f);
+	glClearDepth(1.0f);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+	useShader(shader);
+	setShaderMat4(uniforms.projection, projection);
+}
+
+void Renderer2d::unload() {
+	glClearColor(0.f, 0.f, 0.f, 0.f);
+    glClear(GL_COLOR_BUFFER_BIT);
+	glDeleteProgram(shader);
+}
+
+
+void Renderer2dShape::load(Renderer2dVertex* inVertices, uint32 inNumVertices, Renderer2d* renderer) {
+	numVertices = inNumVertices;
+	useShader(renderer->shader);
+
+	glGenVertexArrays(1, &vao);
+	glBindVertexArray(vao);
+
+	glGenBuffers(1, &vbo);
+	glBindBuffer(GL_ARRAY_BUFFER, vbo);
+	glBufferData(GL_ARRAY_BUFFER, inNumVertices * sizeof(Renderer2dVertex), &inVertices[0], GL_STATIC_DRAW);
+
+	glEnableVertexAttribArray(renderer->attributes.position);
+	glVertexAttribPointer(renderer->attributes.position, 2, GL_FLOAT, GL_FALSE, sizeof(Renderer2dVertex), (GLvoid *)0);
+
+	glEnableVertexAttribArray(renderer->attributes.color);
+	glVertexAttribPointer(renderer->attributes.color, 4, GL_FLOAT, GL_FALSE, sizeof(Renderer2dVertex), (GLvoid *)offsetof(Renderer2dVertex, color));
+
+	glBindBuffer(GL_ARRAY_BUFFER, 0);
+	glBindVertexArray(0);
+}
+
+void Renderer2dShape::render(Renderer2d* renderer, GLenum drawType) {
+	setShaderMat4(renderer->uniforms.model, model);
+
+	glBindVertexArray(vao);
+	glDrawArrays(drawType, 0, numVertices);
+	glBindVertexArray(0);
+}
+
+void Renderer2dShape::unload() {
+	glDeleteVertexArrays(1, &vao);
+	glDeleteBuffers(1, &vbo);
+}