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create a buffer, draw a quad

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This commit is contained in:
Josh Holtrop 2015-06-11 20:06:17 -04:00
parent 60045cb593
commit 5d1351fc66
1 changed files with 14 additions and 0 deletions
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14
test/test.cpp
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@ -11,6 +11,7 @@ using namespace std;
shared_ptr<glcxx::Shader> vs; shared_ptr<glcxx::Shader> vs;
shared_ptr<glcxx::Shader> fs; shared_ptr<glcxx::Shader> fs;
shared_ptr<glcxx::Program> program; shared_ptr<glcxx::Program> program;
shared_ptr<glcxx::Buffer> buffer;
bool init(void) bool init(void)
{ {
@ -20,9 +21,18 @@ bool init(void)
vs = make_shared<glcxx::Shader>(); vs = make_shared<glcxx::Shader>();
fs = make_shared<glcxx::Shader>(); fs = make_shared<glcxx::Shader>();
program = make_shared<glcxx::Program>(); program = make_shared<glcxx::Program>();
buffer = make_shared<glcxx::Buffer>();
vs->create_from_file(GL_VERTEX_SHADER, "test/vert.glsl"); vs->create_from_file(GL_VERTEX_SHADER, "test/vert.glsl");
fs->create_from_file(GL_FRAGMENT_SHADER, "test/frag.glsl"); fs->create_from_file(GL_FRAGMENT_SHADER, "test/frag.glsl");
program->create(vs, fs); program->create(vs, fs);
GLfloat coords[] = {
-0.5, -0.5,
0.5, -0.5,
0.5, 0.5,
-0.5, 0.5
};
buffer->create(GL_ARRAY_BUFFER, GL_STATIC_DRAW, &coords, sizeof(coords));
} }
catch (glcxx::Error & e) catch (glcxx::Error & e)
{ {
@ -35,6 +45,10 @@ bool init(void)
void display(SDL_Window * window) void display(SDL_Window * window)
{ {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(GLfloat), NULL);
program->use();
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
SDL_GL_SwapWindow(window); SDL_GL_SwapWindow(window);
} }