static cairo_status_t
cairo_gl_shader_get_vertex_source (cairo_gl_var_type_t src,
cairo_gl_var_type_t mask,
cairo_gl_var_type_t dest,
char **out)
{
cairo_output_stream_t *stream = _cairo_memory_stream_create ();
unsigned char *source;
unsigned int length;
cairo_status_t status;
cairo_gl_shader_emit_variable (stream, src, CAIRO_GL_TEX_SOURCE);
cairo_gl_shader_emit_variable (stream, mask, CAIRO_GL_TEX_MASK);
_cairo_output_stream_printf (stream,
"void main()\n"
"{\n"
" gl_Position = ftransform();\n");
cairo_gl_shader_emit_vertex (stream, src, CAIRO_GL_TEX_SOURCE);
cairo_gl_shader_emit_vertex (stream, mask, CAIRO_GL_TEX_MASK);
_cairo_output_stream_write (stream,
"}\n\0", 3);
status = _cairo_memory_stream_destroy (stream, &source, &length);
if (unlikely (status))
return status;
*out = (char *) source;
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
cairo_gl_shader_get_vertex_source (cairo_gl_var_type_t src_type,
cairo_gl_var_type_t mask_type,
cairo_bool_t src_use_atlas,
cairo_bool_t mask_use_atlas,
cairo_bool_t use_coverage,
cairo_gl_var_type_t dest,
char **out)
{
cairo_output_stream_t *stream = _cairo_memory_stream_create ();
unsigned char *source;
unsigned long length;
cairo_status_t status;
cairo_gl_shader_emit_variable (stream, src_type, CAIRO_GL_TEX_SOURCE,
src_use_atlas);
cairo_gl_shader_emit_variable (stream, mask_type, CAIRO_GL_TEX_MASK,
mask_use_atlas);
if (use_coverage)
cairo_gl_shader_dcl_coverage (stream);
_cairo_output_stream_printf (stream,
"attribute vec4 Vertex;\n"
"attribute vec4 Color;\n"
"attribute vec4 Coverage;\n"
"attribute vec4 MultiTexCoord0;\n"
"attribute vec4 MultiTexCoord1;\n"
"attribute vec2 StartCoords0;\n"
"attribute vec2 StartCoords1;\n"
"attribute vec2 StopCoords0;\n"
"attribute vec2 StopCoords1;\n"
"uniform mat4 ModelViewProjectionMatrix;\n"
"void main()\n"
"{\n"
" gl_Position = ModelViewProjectionMatrix * Vertex;\n");
cairo_gl_shader_emit_vertex (stream, src_type, CAIRO_GL_TEX_SOURCE);
cairo_gl_shader_emit_vertex (stream, mask_type, CAIRO_GL_TEX_MASK);
if (use_coverage)
cairo_gl_shader_def_coverage (stream);
if (src_use_atlas)
cairo_gl_shader_def_use_atlas (stream, src_type, CAIRO_GL_TEX_SOURCE);
if (mask_use_atlas)
cairo_gl_shader_def_use_atlas (stream, mask_type, CAIRO_GL_TEX_MASK);
_cairo_output_stream_write (stream,
"}\n\0", 3);
status = _cairo_memory_stream_destroy (stream, &source, &length);
if (unlikely (status))
return status;
*out = (char *) source;
return CAIRO_STATUS_SUCCESS;
}
