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#include <mbgl/shader/icon_shader.hpp>
#include <mbgl/shader/icon.vertex.hpp>
#include <mbgl/shader/icon.fragment.hpp>
#include <mbgl/platform/gl.hpp>
#include <cstdio>
using namespace mbgl;
IconShader::IconShader() : Shader("icon", shaders::icon::vertex, shaders::icon::fragment) {
a_offset = MBGL_CHECK_ERROR(glGetAttribLocation(program, "a_offset"));
a_data1 = MBGL_CHECK_ERROR(glGetAttribLocation(program, "a_data1"));
a_data2 = MBGL_CHECK_ERROR(glGetAttribLocation(program, "a_data2"));
}
void IconShader::bind(GLbyte* offset) {
const GLsizei stride = 16;
MBGL_CHECK_ERROR(glEnableVertexAttribArray(a_pos));
MBGL_CHECK_ERROR(glVertexAttribPointer(a_pos, 2, GL_SHORT, false, stride, offset + 0));
MBGL_CHECK_ERROR(glEnableVertexAttribArray(a_offset));
MBGL_CHECK_ERROR(glVertexAttribPointer(a_offset, 2, GL_SHORT, false, stride, offset + 4));
MBGL_CHECK_ERROR(glEnableVertexAttribArray(a_data1));
MBGL_CHECK_ERROR(glVertexAttribPointer(a_data1, 4, GL_UNSIGNED_BYTE, false, stride, offset + 8));
MBGL_CHECK_ERROR(glEnableVertexAttribArray(a_data2));
MBGL_CHECK_ERROR(glVertexAttribPointer(a_data2, 4, GL_UNSIGNED_BYTE, false, stride, offset + 12));
}
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