OpenGL buffers

projects/apis/opengl/src/buffer/opengl_buffer.c

@@ -0,0 +1,33 @@
+#include "opengl_buffer.h"
+
+GLenum gnBufferTypeToGLEnum(gnBufferType type) {
+    switch (type) {
+    case GN_VERTEX_BUFFER: return GL_ARRAY_BUFFER;
+    case GN_INDEX_BUFFER: return GL_ELEMENT_ARRAY_BUFFER;
+    case GN_UNIFORM_BUFFER: return GL_UNIFORM_BUFFER;
+    case GN_STORAGE_BUFFER: return GL_SHADER_STORAGE_BUFFER;
+    }
+}
+
+gnReturnCode openglCreateBuffer(gnBufferHandle buffer, gnDevice device, gnBufferInfo info) {
+    buffer->buffer = malloc(sizeof(gnPlatformBuffer));
+    glCreateBuffers(1, &buffer->buffer->id);
+    buffer->buffer->type = gnBufferTypeToGLEnum(info.type);
+    buffer->buffer->usage = (info.usage == GN_DYNAMIC_DRAW) ? GL_DYNAMIC_DRAW : GL_STATIC_DRAW;
+    return GN_SUCCESS;
+}
+void openglBufferData(gnBufferHandle buffer, size_t dataSize, void* data) {
+    glNamedBufferData(buffer->buffer->id, dataSize, data, buffer->buffer->usage);
+}
+void openglBufferSubData(gnBufferHandle buffer, size_t offset, size_t dataSize, gnBufferMemory data) {
+    glNamedBufferSubData(buffer->buffer->id, offset, dataSize, data);
+}
+void* openglMapBuffer(gnBufferHandle buffer) {
+    return glMapNamedBuffer(buffer->buffer->id, GL_READ_WRITE);
+}
+void openglUnmapBuffer(gnBufferHandle buffer) {
+    glUnmapNamedBuffer(buffer->buffer->id);
+}
+void openglDestroyBuffer(gnBufferHandle buffer) {
+    glDeleteBuffers(1, &buffer->buffer->id);
+}