X-Git-Url: https://git.lukelau.me/?p=wasm.git;a=blobdiff_plain;f=test.cpp;h=cbdf3707e6cd47a2a6259809024a112009c61135;hp=d59323af877cb9a5b084d770b824e96d3a05d51a;hb=HEAD;hpb=aed1f5271c857c3afa085c593d2ca6159770395c

diff --git a/test.cpp b/test.cpp
index d59323a..cbdf370 100644
--- a/test.cpp
+++ b/test.cpp
@@ -1,18 +1,62 @@
-#include <GLES2/gl2.h>
+#include <GLES3/gl32.h>
 #include <string>
+#include <vector>
+#include <glm/glm.hpp>
+#include <glm/ext.hpp>
+#include <glm/gtc/type_ptr.hpp>
 
 const char* vertShaderSrc = R"(
 attribute vec4 vertPos;
+uniform mat4 model;
 void main() {
-		gl_Position = vertPos;
+	gl_Position = model * vertPos;
 }
 )";
 
-extern "C" int foo() {
+const char *fragShaderSrc = R"(
+void main() {
+	gl_FragColor = vec4(1, 0, 1, 1);
+}
+)";
+
+GLuint program;
+
+extern "C" void setup() {
 	GLuint vertShader = glCreateShader(GL_VERTEX_SHADER);
 	const char* sources[1] = { vertShaderSrc };
 	const GLint lengths[1] = { (GLint)strlen(vertShaderSrc) };
 	glShaderSource(vertShader, 1, sources, lengths);
 	glCompileShader(vertShader);
-	return 0;
+
+	GLuint fragShader = glCreateShader(GL_FRAGMENT_SHADER);
+	glShaderSource(fragShader, 1,
+			new const char*[1] { fragShaderSrc },
+			new const GLint[1] { (GLint)strlen(fragShaderSrc) });
+	glCompileShader(fragShader);
+
+	program = glCreateProgram();
+	glAttachShader(program, vertShader);
+	glAttachShader(program, fragShader);
+	glLinkProgram(program);
+	glUseProgram(program);
+
+	GLuint vertPosBuffer;
+	glGenBuffers(1, &vertPosBuffer);
+	glBindBuffer(GL_ARRAY_BUFFER, vertPosBuffer);
+	std::vector<float> vertPositions = {
+		0, 1, 0,
+		1, -1, 0,
+		-1, -1, 0
+	};
+	glBufferData(GL_ARRAY_BUFFER, vertPositions.size(), vertPositions.data(), GL_STATIC_DRAW);
+
+	GLuint vertPosLoc = glGetAttribLocation(program, "vertPos");
+	glEnableVertexAttribArray(vertPosLoc);
+	glVertexAttribPointer(vertPosLoc, 3, GL_FLOAT, false, 0, 0);
+}
+
+extern "C" void update(int tick) {
+	GLuint modelLoc = glGetUniformLocation(program, "model");
+	const glm::mat4 model = glm::rotate(glm::mat4(1), (float)tick * 0.001f, glm::vec3(0, 0, 1));
+	glUniformMatrix4fv(modelLoc, 1, false, glm::value_ptr(model));
 }