diff options
Diffstat (limited to 'cogl/cogl-glsl-shader.c')
| -rw-r--r-- | cogl/cogl-glsl-shader.c | 67 |
1 files changed, 64 insertions, 3 deletions
diff --git a/cogl/cogl-glsl-shader.c b/cogl/cogl-glsl-shader.c index fc3c4f02..894bafdf 100644 --- a/cogl/cogl-glsl-shader.c +++ b/cogl/cogl-glsl-shader.c @@ -39,11 +39,42 @@ #include <glib.h> +static CoglBool +add_layer_vertex_boilerplate_cb (CoglPipelineLayer *layer, + void *user_data) +{ + GString *layer_declarations = user_data; + int unit_index = _cogl_pipeline_layer_get_unit_index (layer); + g_string_append_printf (layer_declarations, + "attribute vec4 cogl_tex_coord%d_in;\n" + "#define cogl_texture_matrix%i cogl_texture_matrix[%i]\n" + "#define cogl_tex_coord%i_out _cogl_tex_coord[%i]\n", + layer->index, + layer->index, + unit_index, + layer->index, + unit_index); + return TRUE; +} + +static CoglBool +add_layer_fragment_boilerplate_cb (CoglPipelineLayer *layer, + void *user_data) +{ + GString *layer_declarations = user_data; + g_string_append_printf (layer_declarations, + "#define cogl_tex_coord%i_in _cogl_tex_coord[%i]\n", + layer->index, + _cogl_pipeline_layer_get_unit_index (layer)); + return TRUE; +} + void _cogl_glsl_shader_set_source_with_boilerplate (CoglContext *ctx, const char *version_string, GLuint shader_gl_handle, GLenum shader_gl_type, + CoglPipeline *pipeline, GLsizei count_in, const char **strings_in, const GLint *lengths_in) @@ -54,7 +85,8 @@ _cogl_glsl_shader_set_source_with_boilerplate (CoglContext *ctx, const char **strings = g_alloca (sizeof (char *) * (count_in + 4)); GLint *lengths = g_alloca (sizeof (GLint) * (count_in + 4)); int count = 0; - char *tex_coord_declarations = NULL; + + int n_layers; vertex_boilerplate = _COGL_VERTEX_SHADER_BOILERPLATE; fragment_boilerplate = _COGL_FRAGMENT_SHADER_BOILERPLATE; @@ -85,6 +117,37 @@ _cogl_glsl_shader_set_source_with_boilerplate (CoglContext *ctx, lengths[count++] = strlen (fragment_boilerplate); } + n_layers = cogl_pipeline_get_n_layers (pipeline); + if (n_layers) + { + GString *layer_declarations = ctx->codegen_boilerplate_buffer; + g_string_set_size (layer_declarations, 0); + + g_string_append_printf (layer_declarations, + "varying vec4 _cogl_tex_coord[%d];\n", + n_layers); + + if (shader_gl_type == GL_VERTEX_SHADER) + { + g_string_append_printf (layer_declarations, + "uniform mat4 cogl_texture_matrix[%d];\n", + n_layers); + + _cogl_pipeline_foreach_layer_internal (pipeline, + add_layer_vertex_boilerplate_cb, + layer_declarations); + } + else if (shader_gl_type == GL_FRAGMENT_SHADER) + { + _cogl_pipeline_foreach_layer_internal (pipeline, + add_layer_fragment_boilerplate_cb, + layer_declarations); + } + + strings[count] = layer_declarations->str; + lengths[count++] = -1; /* null terminated */ + } + memcpy (strings + count, strings_in, sizeof (char *) * count_in); if (lengths_in) memcpy (lengths + count, lengths_in, sizeof (GLint) * count_in); @@ -119,6 +182,4 @@ _cogl_glsl_shader_set_source_with_boilerplate (CoglContext *ctx, GE( ctx, glShaderSource (shader_gl_handle, count, (const char **) strings, lengths) ); - - g_free (tex_coord_declarations); } |