#include <math.h>
#include <string.h>
-static const char *
-get_shader_type_name (int type)
-{
- switch (type)
- {
- case GL_VERTEX_SHADER:
- return "vertex";
- case GL_GEOMETRY_SHADER:
- return "geometry";
- case GL_FRAGMENT_SHADER:
- return "fragment";
- default:
- return "unknown";
- }
-}
-
-static guint
-create_shader (int type,
- const char *code)
-{
- guint shader;
- int status;
-
- shader = glCreateShader (type);
- glShaderSource (shader, 1, &code, NULL);
- glCompileShader (shader);
-
- glGetShaderiv (shader, GL_COMPILE_STATUS, &status);
- if (status == GL_FALSE)
- {
- int log_len;
- char *buffer;
-
- glGetShaderiv (shader, GL_INFO_LOG_LENGTH, &log_len);
-
- buffer = g_malloc (log_len + 1);
- glGetShaderInfoLog (shader, log_len, NULL, buffer);
-
- g_warning ("Compile failure in %s shader:\n%s", get_shader_type_name (type), buffer);
- g_free (buffer);
-
- glDeleteShader (shader);
-
- return 0;
- }
-
- return shader;
-}
-
-static void
-make_program (GdkGLContextProgram *program,
- const char *vertex_shader_path,
- const char *fragment_shader_path)
-{
- guint vertex_shader, fragment_shader;
- GBytes *source;
- int status;
-
- source = g_resources_lookup_data (vertex_shader_path, 0, NULL);
- g_assert (source != NULL);
- vertex_shader = create_shader (GL_VERTEX_SHADER, g_bytes_get_data (source, NULL));
- g_bytes_unref (source);
- if (vertex_shader == 0)
- return;
-
- source = g_resources_lookup_data (fragment_shader_path, 0, NULL);
- g_assert (source != NULL);
- fragment_shader = create_shader (GL_FRAGMENT_SHADER, g_bytes_get_data (source, NULL));
- g_bytes_unref (source);
- if (fragment_shader == 0)
- {
- glDeleteShader (vertex_shader);
- return;
- }
-
- program->program = glCreateProgram ();
- glAttachShader (program->program, vertex_shader);
- glAttachShader (program->program, fragment_shader);
-
- glLinkProgram (program->program);
-
- glDetachShader (program->program, vertex_shader);
- glDetachShader (program->program, fragment_shader);
-
- glDeleteShader (vertex_shader);
- glDeleteShader (fragment_shader);
-
- glGetProgramiv (program->program, GL_LINK_STATUS, &status);
- if (status == GL_FALSE)
- {
- int log_len;
- char *buffer;
-
- glGetProgramiv (program->program, GL_INFO_LOG_LENGTH, &log_len);
-
- buffer = g_malloc (log_len + 1);
- glGetProgramInfoLog (program->program, log_len, NULL, buffer);
- g_warning ("Linker failure: %s\n", buffer);
- g_free (buffer);
-
- glDeleteProgram (program->program);
- }
-
- program->position_location = glGetAttribLocation (program->program, "position");
- program->uv_location = glGetAttribLocation (program->program, "uv");
- program->map_location = glGetUniformLocation (program->program, "map");
- program->flip_location = glGetUniformLocation (program->program, "flipColors");
-}
-
-static void
-bind_vao (GdkGLContextPaintData *paint_data)
-{
- if (paint_data->vertex_array_object == 0)
- {
- glGenVertexArrays (1, &paint_data->vertex_array_object);
- /* ATM we only use one VAO, so always bind it */
- glBindVertexArray (paint_data->vertex_array_object);
- }
-}
-
-static void
-use_texture_gles_program (GdkGLContextPaintData *paint_data)
-{
- if (paint_data->texture_2d_quad_program.program == 0)
- make_program (&paint_data->texture_2d_quad_program,
- "/org/gtk/libgdk/glsl/gles2-texture.vs.glsl",
- "/org/gtk/libgdk/glsl/gles2-texture.fs.glsl");
-
- if (paint_data->current_program != &paint_data->texture_2d_quad_program)
- {
- paint_data->current_program = &paint_data->texture_2d_quad_program;
- glUseProgram (paint_data->current_program->program);
- }
-}
-
-static void
-use_texture_2d_program (GdkGLContextPaintData *paint_data)
-{
- const char *vertex_shader_path = paint_data->is_legacy
- ? "/org/gtk/libgdk/glsl/gl2-texture-2d.vs.glsl"
- : "/org/gtk/libgdk/glsl/gl3-texture-2d.vs.glsl";
-
- const char *fragment_shader_path = paint_data->is_legacy
- ? "/org/gtk/libgdk/glsl/gl2-texture-2d.fs.glsl"
- : "/org/gtk/libgdk/glsl/gl3-texture-2d.fs.glsl";
-
- if (paint_data->texture_2d_quad_program.program == 0)
- make_program (&paint_data->texture_2d_quad_program, vertex_shader_path, fragment_shader_path);
-
- if (paint_data->current_program != &paint_data->texture_2d_quad_program)
- {
- paint_data->current_program = &paint_data->texture_2d_quad_program;
- glUseProgram (paint_data->current_program->program);
- }
-}
-
-static void
-use_texture_rect_program (GdkGLContextPaintData *paint_data)
-{
- const char *vertex_shader_path = paint_data->is_legacy
- ? "/org/gtk/libgdk/glsl/gl2-texture-rect.vs.glsl"
- : "/org/gtk/libgdk/glsl/gl3-texture-rect.vs.glsl";
-
- const char *fragment_shader_path = paint_data->is_legacy
- ? "/org/gtk/libgdk/glsl/gl2-texture-rect.fs.glsl"
- : "/org/gtk/libgdk/glsl/gl3-texture-rect.vs.glsl";
-
- if (paint_data->texture_rect_quad_program.program == 0)
- make_program (&paint_data->texture_rect_quad_program, vertex_shader_path, fragment_shader_path);
-
- if (paint_data->current_program != &paint_data->texture_rect_quad_program)
- {
- paint_data->current_program = &paint_data->texture_rect_quad_program;
- glUseProgram (paint_data->current_program->program);
- }
-}
-
-void
-gdk_gl_texture_quads (GdkGLContext *paint_context,
- guint texture_target,
- int n_quads,
- GdkTexturedQuad *quads,
- gboolean flip_colors)
-{
- GdkGLContextPaintData *paint_data = gdk_gl_context_get_paint_data (paint_context);
- GdkGLContextProgram *program;
- GdkSurface *surface = gdk_gl_context_get_surface (paint_context);
- int surface_scale = gdk_surface_get_scale_factor (surface);
- float w = gdk_surface_get_width (surface) * surface_scale;
- float h = gdk_surface_get_height (surface) * surface_scale;
- int i;
- float *vertex_buffer_data;
-
- bind_vao (paint_data);
-
- if (paint_data->tmp_vertex_buffer == 0)
- glGenBuffers(1, &paint_data->tmp_vertex_buffer);
-
- if (paint_data->use_es)
- use_texture_gles_program (paint_data);
- else
- {
- if (texture_target == GL_TEXTURE_RECTANGLE_ARB)
- use_texture_rect_program (paint_data);
- else
- use_texture_2d_program (paint_data);
- }
-
- program = paint_data->current_program;
-
- /* Use texture unit 0 */
- glActiveTexture (GL_TEXTURE0);
- glUniform1i(program->map_location, 0);
-
- /* Flip 'R' and 'B' colors on GLES, if necessary */
- if (gdk_gl_context_get_use_es (paint_context))
- glUniform1i (program->flip_location, flip_colors ? 1 : 0);
-
- glEnableVertexAttribArray (program->position_location);
- glEnableVertexAttribArray (program->uv_location);
- glBindBuffer (GL_ARRAY_BUFFER, paint_data->tmp_vertex_buffer);
-
- glVertexAttribPointer (program->position_location, 2, GL_FLOAT, GL_FALSE, sizeof(float) * 4, NULL);
- glVertexAttribPointer (program->uv_location, 2, GL_FLOAT, GL_FALSE, sizeof(float) * 4, (void *) (sizeof(float) * 2));
-
-#define VERTEX_SIZE 4
-
-#define QUAD_N_VERTICES 6
-
-#define QUAD_SIZE (VERTEX_SIZE * QUAD_N_VERTICES)
-
- vertex_buffer_data = g_new (float, n_quads * QUAD_SIZE);
-
- for (i = 0; i < n_quads; i++)
- {
- GdkTexturedQuad *quad = &quads[i];
- float vertex_data[] = {
- (quad->x1 * 2) / w - 1, (quad->y1 * 2) / h - 1, quad->u1, quad->v1,
- (quad->x1 * 2) / w - 1, (quad->y2 * 2) / h - 1, quad->u1, quad->v2,
- (quad->x2 * 2) / w - 1, (quad->y1 * 2) / h - 1, quad->u2, quad->v1,
-
- (quad->x2 * 2) / w - 1, (quad->y2 * 2) / h - 1, quad->u2, quad->v2,
- (quad->x1 * 2) / w - 1, (quad->y2 * 2) / h - 1, quad->u1, quad->v2,
- (quad->x2 * 2) / w - 1, (quad->y1 * 2) / h - 1, quad->u2, quad->v1,
- };
-
- float *vertex = &vertex_buffer_data[i * QUAD_SIZE];
- memcpy (vertex, vertex_data, sizeof(vertex_data));
- }
-
- glBufferData (GL_ARRAY_BUFFER, sizeof(float) * n_quads * QUAD_SIZE, vertex_buffer_data, GL_STREAM_DRAW);
- glDrawArrays (GL_TRIANGLES, 0, n_quads * QUAD_N_VERTICES);
-
- g_free (vertex_buffer_data);
-
- glDisableVertexAttribArray (program->position_location);
- glDisableVertexAttribArray (program->uv_location);
-}
-
/* x,y,width,height describes a rectangle in the gl render buffer
coordinate space, and its top left corner is drawn at the current
position according to the cairo translation. */
cairo_surface_t *image;
guint framebuffer;
int alpha_size = 0;
- GdkGLContextPaintData *paint_data;
int major, minor, version;
gboolean es_use_bgra = FALSE;
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