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gtk2/gsk/gl/gskglrenderer.c

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#include "config.h"
#include "gskglrendererprivate.h"
#include "gskdebugprivate.h"
#include "gskenums.h"
#include "gskgldriverprivate.h"
#include "gskglprofilerprivate.h"
#include "gskprofilerprivate.h"
#include "gskrendererprivate.h"
#include "gskrendernodeprivate.h"
#include "gskshaderbuilderprivate.h"
#include "gskglglyphcacheprivate.h"
#include "gdk/gdktextureprivate.h"
#include "gskglrenderopsprivate.h"
#include "gskprivate.h"
#include <epoxy/gl.h>
#include <cairo-ft.h>
#define SHADER_VERSION_GLES 100
#define SHADER_VERSION_GL2_LEGACY 110
#define SHADER_VERSION_GL3_LEGACY 130
#define SHADER_VERSION_GL3 150
#define ORTHO_NEAR_PLANE -10000
#define ORTHO_FAR_PLANE 10000
#define HIGHLIGHT_FALLBACK 0
#define DEBUG_OPS 0
#if DEBUG_OPS
#define OP_PRINT(format, ...) g_print(format, ## __VA_ARGS__)
#else
#define OP_PRINT(format, ...)
#endif
#define INIT_PROGRAM_UNIFORM_LOCATION(program_name, location_name, uniform_name) \
G_STMT_START{\
self->program_name.location_name = glGetUniformLocation(self->program_name.id, uniform_name);\
g_assert (self->program_name.location_name != 0); \
}G_STMT_END
static void G_GNUC_UNUSED
dump_framebuffer (const char *filename, int w, int h)
{
int stride = cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32, w);
guchar *data = g_malloc (h * stride);
cairo_surface_t *s;
glReadPixels (0, 0, w, h, GL_BGRA, GL_UNSIGNED_BYTE, data);
s = cairo_image_surface_create_for_data (data, CAIRO_FORMAT_ARGB32, w, h, stride);
cairo_surface_write_to_png (s, filename);
cairo_surface_destroy (s);
g_free (data);
}
static gboolean G_GNUC_UNUSED
font_has_color_glyphs (const PangoFont *font)
{
cairo_scaled_font_t *scaled_font;
gboolean has_color = FALSE;
scaled_font = pango_cairo_font_get_scaled_font ((PangoCairoFont *)font);
if (cairo_scaled_font_get_type (scaled_font) == CAIRO_FONT_TYPE_FT)
{
FT_Face ft_face = cairo_ft_scaled_font_lock_face (scaled_font);
has_color = (FT_HAS_COLOR (ft_face) != 0);
cairo_ft_scaled_font_unlock_face (scaled_font);
}
return has_color;
}
static void gsk_gl_renderer_setup_render_mode (GskGLRenderer *self);
static int add_offscreen_ops (GskGLRenderer *self,
RenderOpBuilder *builder,
float min_x,
float max_x,
float min_y,
float max_y,
GskRenderNode *child_node);
#ifdef G_ENABLE_DEBUG
typedef struct
{
GQuark frames;
GQuark draw_calls;
} ProfileCounters;
typedef struct
{
GQuark cpu_time;
GQuark gpu_time;
} ProfileTimers;
#endif
typedef enum
{
RENDER_FULL,
RENDER_SCISSOR
} RenderMode;
struct _GskGLRenderer
{
GskRenderer parent_instance;
int scale_factor;
graphene_rect_t viewport;
guint frame_buffer;
guint depth_stencil_buffer;
guint texture_id;
GdkGLContext *gl_context;
GskGLDriver *gl_driver;
GskGLProfiler *gl_profiler;
union {
Program programs[GL_N_PROGRAMS];
struct {
Program blend_program;
Program blit_program;
Program color_program;
Program coloring_program;
Program color_matrix_program;
Program linear_gradient_program;
};
};
GArray *render_ops;
GskGLGlyphCache glyph_cache;
#ifdef G_ENABLE_DEBUG
ProfileCounters profile_counters;
ProfileTimers profile_timers;
#endif
RenderMode render_mode;
gboolean has_buffers : 1;
};
struct _GskGLRendererClass
{
GskRendererClass parent_class;
};
G_DEFINE_TYPE (GskGLRenderer, gsk_gl_renderer, GSK_TYPE_RENDERER)
static void
gsk_gl_renderer_dispose (GObject *gobject)
{
GskGLRenderer *self = GSK_GL_RENDERER (gobject);
g_clear_pointer (&self->render_ops, g_array_unref);
G_OBJECT_CLASS (gsk_gl_renderer_parent_class)->dispose (gobject);
}
static void
gsk_gl_renderer_create_buffers (GskGLRenderer *self,
int width,
int height,
int scale_factor)
{
if (self->has_buffers)
return;
GSK_NOTE (OPENGL, g_print ("Creating buffers (w:%d, h:%d, scale:%d)\n", width, height, scale_factor));
if (self->texture_id == 0)
{
self->texture_id = gsk_gl_driver_create_texture (self->gl_driver,
width * scale_factor,
height * scale_factor);
gsk_gl_driver_bind_source_texture (self->gl_driver, self->texture_id);
gsk_gl_driver_init_texture_empty (self->gl_driver, self->texture_id);
}
gsk_gl_driver_create_render_target (self->gl_driver, self->texture_id, TRUE, TRUE);
gsk_gl_driver_bind_render_target (self->gl_driver, self->texture_id);
self->has_buffers = TRUE;
}
static void
gsk_gl_renderer_destroy_buffers (GskGLRenderer *self)
{
if (self->gl_context == NULL)
return;
if (!self->has_buffers)
return;
GSK_NOTE (OPENGL, g_print ("Destroying buffers\n"));
gdk_gl_context_make_current (self->gl_context);
if (self->texture_id != 0)
{
gsk_gl_driver_destroy_texture (self->gl_driver, self->texture_id);
self->texture_id = 0;
}
self->has_buffers = FALSE;
}
static void
init_common_locations (GskGLRenderer *self,
GskShaderBuilder *builder,
Program *prog)
{
prog->source_location = glGetUniformLocation (prog->id, "uSource");
prog->mask_location = glGetUniformLocation (prog->id, "uMask");
prog->alpha_location = glGetUniformLocation (prog->id, "uAlpha");
prog->blend_mode_location = glGetUniformLocation (prog->id, "uBlendMode");
prog->viewport_location = glGetUniformLocation (prog->id, "uViewport");
prog->projection_location = glGetUniformLocation (prog->id, "uProjection");
prog->modelview_location = glGetUniformLocation (prog->id, "uModelview");
prog->clip_location = glGetUniformLocation (prog->id, "uClip");
prog->clip_corner_widths_location = glGetUniformLocation (prog->id, "uClipCornerWidths");
prog->clip_corner_heights_location = glGetUniformLocation (prog->id, "uClipCornerHeights");
prog->position_location = glGetAttribLocation (prog->id, "aPosition");
prog->uv_location = glGetAttribLocation (prog->id, "aUv");
}
static gboolean
gsk_gl_renderer_create_programs (GskGLRenderer *self,
GError **error)
{
GskShaderBuilder *builder;
GError *shader_error = NULL;
gboolean res = FALSE;
builder = gsk_shader_builder_new ();
gsk_shader_builder_set_resource_base_path (builder, "/org/gtk/libgsk/glsl");
if (gdk_gl_context_get_use_es (self->gl_context))
{
gsk_shader_builder_set_version (builder, SHADER_VERSION_GLES);
gsk_shader_builder_set_vertex_preamble (builder, "es2_common.vs.glsl");
gsk_shader_builder_set_fragment_preamble (builder, "es2_common.fs.glsl");
gsk_shader_builder_add_define (builder, "GSK_GLES", "1");
}
else if (gdk_gl_context_is_legacy (self->gl_context))
{
int maj, min;
gdk_gl_context_get_version (self->gl_context, &maj, &min);
if (maj == 3)
gsk_shader_builder_set_version (builder, SHADER_VERSION_GL3_LEGACY);
else
gsk_shader_builder_set_version (builder, SHADER_VERSION_GL2_LEGACY);
gsk_shader_builder_set_vertex_preamble (builder, "gl_common.vs.glsl");
gsk_shader_builder_set_fragment_preamble (builder, "gl_common.fs.glsl");
gsk_shader_builder_add_define (builder, "GSK_LEGACY", "1");
}
else
{
gsk_shader_builder_set_version (builder, SHADER_VERSION_GL3);
gsk_shader_builder_set_vertex_preamble (builder, "gl3_common.vs.glsl");
gsk_shader_builder_set_fragment_preamble (builder, "gl3_common.fs.glsl");
gsk_shader_builder_add_define (builder, "GSK_GL3", "1");
}
#ifdef G_ENABLE_DEBUG
if (GSK_RENDER_MODE_CHECK (SHADERS))
gsk_shader_builder_add_define (builder, "GSK_DEBUG", "1");
#endif
self->blend_program.id = gsk_shader_builder_create_program (builder,
"blend.vs.glsl", "blend.fs.glsl",
&shader_error);
if (shader_error != NULL)
{
g_propagate_prefixed_error (error,
shader_error,
"Unable to create 'blend' program: ");
goto out;
}
self->blend_program.index = 0;
self->blend_program.name = "blend";
init_common_locations (self, builder, &self->blend_program);
self->blit_program.id = gsk_shader_builder_create_program (builder,
"blit.vs.glsl", "blit.fs.glsl",
&shader_error);
if (shader_error != NULL)
{
g_propagate_prefixed_error (error,
shader_error,
"Unable to create 'blit' program: ");
goto out;
}
self->blit_program.index = 1;
self->blit_program.name = "blit";
init_common_locations (self, builder, &self->blit_program);
self->color_program.id = gsk_shader_builder_create_program (builder,
"blit.vs.glsl", "color.fs.glsl",
&shader_error);
if (shader_error != NULL)
{
g_propagate_prefixed_error (error,
shader_error,
"Unable to create 'color' program: ");
goto out;
}
self->color_program.index = 2;
self->color_program.name = "color";
init_common_locations (self, builder, &self->color_program);
INIT_PROGRAM_UNIFORM_LOCATION (color_program, color_location, "uColor");
self->coloring_program.id = gsk_shader_builder_create_program (builder,
"blit.vs.glsl", "coloring.fs.glsl",
&shader_error);
if (shader_error != NULL)
{
g_propagate_prefixed_error (error,
shader_error,
"Unable to create 'coloring' program: ");
goto out;
}
self->coloring_program.index = 3;
self->coloring_program.name = "coloring";
init_common_locations (self, builder, &self->coloring_program);
INIT_PROGRAM_UNIFORM_LOCATION (coloring_program, color_location, "uColor");
self->color_matrix_program.id = gsk_shader_builder_create_program (builder,
"blit.vs.glsl", "color_matrix.fs.glsl",
&shader_error);
if (shader_error != NULL)
{
g_propagate_prefixed_error (error,
shader_error,
"Unable to create 'color_matrix' program: ");
goto out;
}
self->color_matrix_program.index = 4;
self->color_matrix_program.name = "color matrix";
init_common_locations (self, builder, &self->color_matrix_program);
INIT_PROGRAM_UNIFORM_LOCATION (color_matrix_program, color_matrix_location, "uColorMatrix");
INIT_PROGRAM_UNIFORM_LOCATION (color_matrix_program, color_offset_location, "uColorOffset");
self->linear_gradient_program.id = gsk_shader_builder_create_program (builder,
"blit.vs.glsl", "linear_gradient.fs.glsl",
&shader_error);
if (shader_error != NULL)
{
g_propagate_prefixed_error (error,
shader_error,
"Unable to create 'linear_gradient' program: ");
goto out;
}
self->linear_gradient_program.index = 5;
self->linear_gradient_program.name = "linear gradient";
init_common_locations (self, builder, &self->linear_gradient_program);
INIT_PROGRAM_UNIFORM_LOCATION (linear_gradient_program, color_stops_location, "uColorStops");
INIT_PROGRAM_UNIFORM_LOCATION (linear_gradient_program, color_offsets_location, "uColorOffsets");
INIT_PROGRAM_UNIFORM_LOCATION (linear_gradient_program, n_color_stops_location, "uNumColorStops");
INIT_PROGRAM_UNIFORM_LOCATION (linear_gradient_program, start_point_location, "uStartPoint");
INIT_PROGRAM_UNIFORM_LOCATION (linear_gradient_program, end_point_location, "uEndPoint");
res = TRUE;
out:
g_object_unref (builder);
return res;
}
static gboolean
gsk_gl_renderer_realize (GskRenderer *renderer,
GdkWindow *window,
GError **error)
{
GskGLRenderer *self = GSK_GL_RENDERER (renderer);
self->scale_factor = gdk_window_get_scale_factor (window);
/* If we didn't get a GdkGLContext before realization, try creating
* one now, for our exclusive use.
*/
if (self->gl_context == NULL)
{
self->gl_context = gdk_window_create_gl_context (window, error);
if (self->gl_context == NULL)
return FALSE;
}
if (!gdk_gl_context_realize (self->gl_context, error))
return FALSE;
gdk_gl_context_make_current (self->gl_context);
g_assert (self->gl_driver == NULL);
self->gl_profiler = gsk_gl_profiler_new (self->gl_context);
self->gl_driver = gsk_gl_driver_new (self->gl_context);
GSK_NOTE (OPENGL, g_print ("Creating buffers and programs\n"));
if (!gsk_gl_renderer_create_programs (self, error))
return FALSE;
gsk_gl_glyph_cache_init (&self->glyph_cache, self->gl_driver);
return TRUE;
}
static void
gsk_gl_renderer_unrealize (GskRenderer *renderer)
{
GskGLRenderer *self = GSK_GL_RENDERER (renderer);
if (self->gl_context == NULL)
return;
gdk_gl_context_make_current (self->gl_context);
/* We don't need to iterate to destroy the associated GL resources,
* as they will be dropped when we finalize the GskGLDriver
*/
g_array_set_size (self->render_ops, 0);
glDeleteProgram (self->blend_program.id);
glDeleteProgram (self->blit_program.id);
glDeleteProgram (self->color_program.id);
glDeleteProgram (self->coloring_program.id);
glDeleteProgram (self->color_matrix_program.id);
glDeleteProgram (self->linear_gradient_program.id);
gsk_gl_renderer_destroy_buffers (self);
gsk_gl_glyph_cache_free (&self->glyph_cache);
g_clear_object (&self->gl_profiler);
g_clear_object (&self->gl_driver);
if (self->gl_context == gdk_gl_context_get_current ())
gdk_gl_context_clear_current ();
g_clear_object (&self->gl_context);
}
static GdkDrawingContext *
gsk_gl_renderer_begin_draw_frame (GskRenderer *renderer,
const cairo_region_t *update_area)
{
GskGLRenderer *self = GSK_GL_RENDERER (renderer);
cairo_region_t *damage;
GdkDrawingContext *result;
GdkRectangle whole_window;
GdkWindow *window;
window = gsk_renderer_get_window (renderer);
whole_window = (GdkRectangle) {
0, 0,
gdk_window_get_width (window) * self->scale_factor,
gdk_window_get_height (window) * self->scale_factor
};
damage = gdk_gl_context_get_damage (self->gl_context);
cairo_region_union (damage, update_area);
if (cairo_region_contains_rectangle (damage, &whole_window) == CAIRO_REGION_OVERLAP_IN)
{
self->render_mode = RENDER_FULL;
}
else
{
GdkRectangle extents;
cairo_region_get_extents (damage, &extents);
cairo_region_union_rectangle (damage, &extents);
if (gdk_rectangle_equal (&extents, &whole_window))
self->render_mode = RENDER_FULL;
else
self->render_mode = RENDER_SCISSOR;
}
result = gdk_window_begin_draw_frame (window,
GDK_DRAW_CONTEXT (self->gl_context),
damage);
cairo_region_destroy (damage);
return result;
}
static void
gsk_gl_renderer_resize_viewport (GskGLRenderer *self,
const graphene_rect_t *viewport)
{
int width = viewport->size.width;
int height = viewport->size.height;
GSK_NOTE (OPENGL, g_print ("glViewport(0, 0, %d, %d) [scale:%d]\n",
width,
height,
self->scale_factor));
graphene_rect_init (&self->viewport, 0, 0, width, height);
glViewport (0, 0, width, height);
}
static void
get_gl_scaling_filters (GskRenderNode *node,
int *min_filter_r,
int *mag_filter_r)
{
*min_filter_r = GL_NEAREST;
*mag_filter_r = GL_NEAREST;
}
static void
gsk_gl_renderer_clear_tree (GskGLRenderer *self)
{
int removed_textures;
if (self->gl_context == NULL)
return;
gdk_gl_context_make_current (self->gl_context);
g_array_remove_range (self->render_ops, 0, self->render_ops->len);
removed_textures = gsk_gl_driver_collect_textures (self->gl_driver);
GSK_NOTE (OPENGL, g_print ("Collected: %d textures\n",
removed_textures));
}
static void
gsk_gl_renderer_clear (GskGLRenderer *self)
{
GSK_NOTE (OPENGL, g_print ("Clearing viewport\n"));
glClearColor (0, 0, 0, 0);
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
}
static void
gsk_gl_renderer_setup_render_mode (GskGLRenderer *self)
{
switch (self->render_mode)
{
case RENDER_FULL:
glDisable (GL_SCISSOR_TEST);
break;
case RENDER_SCISSOR:
{
GdkDrawingContext *context = gsk_renderer_get_drawing_context (GSK_RENDERER (self));
GdkWindow *window = gsk_renderer_get_window (GSK_RENDERER (self));
cairo_region_t *clip = gdk_drawing_context_get_clip (context);
cairo_rectangle_int_t extents;
int window_height;
/* Fall back to RENDER_FULL */
if (clip == NULL)
{
glDisable (GL_SCISSOR_TEST);
return;
}
g_assert (cairo_region_num_rectangles (clip) == 1);
window_height = gdk_window_get_height (window) * self->scale_factor;
/*cairo_region_get_extents (clip, &extents);*/
cairo_region_get_rectangle (clip, 0, &extents);
glEnable (GL_SCISSOR_TEST);
glScissor (extents.x * self->scale_factor,
window_height - (extents.height * self->scale_factor) - (extents.y * self->scale_factor),
extents.width * self->scale_factor,
extents.height * self->scale_factor);
cairo_region_destroy (clip);
break;
}
default:
g_assert_not_reached ();
break;
}
}
static void
gsk_gl_renderer_add_render_ops (GskGLRenderer *self,
GskRenderNode *node,
RenderOpBuilder *builder)
{
float min_x = node->bounds.origin.x;
float min_y = node->bounds.origin.y;
float max_x = min_x + node->bounds.size.width;
float max_y = min_y + node->bounds.size.height;
/* Default vertex data */
GskQuadVertex vertex_data[GL_N_VERTICES] = {
{ { min_x, min_y }, { 0, 0 }, },
{ { min_x, max_y }, { 0, 1 }, },
{ { max_x, min_y }, { 1, 0 }, },
{ { max_x, max_y }, { 1, 1 }, },
{ { min_x, max_y }, { 0, 1 }, },
{ { max_x, min_y }, { 1, 0 }, },
};
#if DEBUG_OPS
if (gsk_render_node_get_node_type (node) != GSK_CONTAINER_NODE)
g_message ("Adding ops for node %s with type %u", node->name,
gsk_render_node_get_node_type (node));
#endif
switch (gsk_render_node_get_node_type (node))
{
case GSK_NOT_A_RENDER_NODE:
g_assert_not_reached ();
case GSK_CONTAINER_NODE:
{
guint i, p;
for (i = 0, p = gsk_container_node_get_n_children (node); i < p; i ++)
{
GskRenderNode *child = gsk_container_node_get_child (node, i);
gsk_gl_renderer_add_render_ops (self, child, builder);
}
}
break;
case GSK_COLOR_NODE:
{
RenderOp op;
ops_set_program (builder, &self->color_program);
op.op = OP_CHANGE_COLOR;
op.color = *gsk_color_node_peek_color (node);
ops_add (builder, &op);
ops_draw (builder, vertex_data);
}
break;
case GSK_TEXTURE_NODE:
{
GdkTexture *texture = gsk_texture_node_get_texture (node);
int gl_min_filter = GL_NEAREST, gl_mag_filter = GL_NEAREST;
int texture_id;
get_gl_scaling_filters (node, &gl_min_filter, &gl_mag_filter);
texture_id = gsk_gl_driver_get_texture_for_texture (self->gl_driver,
texture,
gl_min_filter,
gl_mag_filter);
ops_set_program (builder, &self->blit_program);
ops_set_texture (builder, texture_id);
ops_draw (builder, vertex_data);
}
break;
case GSK_CAIRO_NODE:
{
const cairo_surface_t *surface = gsk_cairo_node_peek_surface (node);
int gl_min_filter = GL_NEAREST, gl_mag_filter = GL_NEAREST;
int texture_id;
if (surface == NULL)
return;
get_gl_scaling_filters (node, &gl_min_filter, &gl_mag_filter);
texture_id = gsk_gl_driver_create_texture (self->gl_driver,
max_x - min_x,
max_y - min_y);
gsk_gl_driver_bind_source_texture (self->gl_driver, texture_id);
gsk_gl_driver_init_texture_with_surface (self->gl_driver,
texture_id,
(cairo_surface_t *)surface,
gl_min_filter,
gl_mag_filter);
ops_set_program (builder, &self->blit_program);
ops_set_texture (builder, texture_id);
ops_draw (builder, vertex_data);
}
break;
case GSK_TRANSFORM_NODE:
{
GskRenderNode *child = gsk_transform_node_get_child (node);
graphene_matrix_t prev_mv;
graphene_matrix_t transform, transformed_mv;
graphene_matrix_init_from_matrix (&transform, gsk_transform_node_peek_transform (node));
graphene_matrix_multiply (&transform, &builder->current_modelview, &transformed_mv);
prev_mv = ops_set_modelview (builder, &transformed_mv);
gsk_gl_renderer_add_render_ops (self, child, builder);
ops_set_modelview (builder, &prev_mv);
}
break;
case GSK_OPACITY_NODE:
{
int texture_id;
float prev_opacity;
GskQuadVertex vertex_data[GL_N_VERTICES] = {
{ { min_x, min_y }, { 0, 1 }, },
{ { min_x, max_y }, { 0, 0 }, },
{ { max_x, min_y }, { 1, 1 }, },
{ { max_x, max_y }, { 1, 0 }, },
{ { min_x, max_y }, { 0, 0 }, },
{ { max_x, min_y }, { 1, 1 }, },
};
texture_id = add_offscreen_ops (self, builder, min_x, max_x, min_y, max_y,
gsk_opacity_node_get_child (node));
/* Now draw the texture with the node's opacity */
ops_set_program (builder, &self->blit_program);
prev_opacity = ops_set_opacity (builder, gsk_opacity_node_get_opacity (node));
ops_set_texture (builder, texture_id);
ops_draw (builder, vertex_data);
ops_set_opacity (builder, prev_opacity);
}
break;
case GSK_LINEAR_GRADIENT_NODE:
{
RenderOp op;
int n_color_stops = MIN (8, gsk_linear_gradient_node_get_n_color_stops (node));
const GskColorStop *stops = gsk_linear_gradient_node_peek_color_stops (node);
const graphene_point_t *start = gsk_linear_gradient_node_peek_start (node);
const graphene_point_t *end = gsk_linear_gradient_node_peek_end (node);
int i;
for (i = 0; i < n_color_stops; i ++)
{
const GskColorStop *stop = stops + i;
op.linear_gradient.color_stops[(i * 4) + 0] = stop->color.red;
op.linear_gradient.color_stops[(i * 4) + 1] = stop->color.green;
op.linear_gradient.color_stops[(i * 4) + 2] = stop->color.blue;
op.linear_gradient.color_stops[(i * 4) + 3] = stop->color.alpha;
op.linear_gradient.color_offsets[i] = stop->offset;
}
ops_set_program (builder, &self->linear_gradient_program);
op.op = OP_CHANGE_LINEAR_GRADIENT;
op.linear_gradient.n_color_stops = n_color_stops;
op.linear_gradient.start_point = *start;
op.linear_gradient.end_point = *end;
ops_add (builder, &op);
ops_draw (builder, vertex_data);
}
break;
case GSK_CLIP_NODE:
{
GskRoundedRect prev_clip;
GskRenderNode *child = gsk_clip_node_get_child (node);
graphene_rect_t transformed_clip;
graphene_rect_t intersection;
GskRoundedRect child_clip;
transformed_clip = *gsk_clip_node_peek_clip (node);
graphene_matrix_transform_bounds (&builder->current_modelview, &transformed_clip, &transformed_clip);
graphene_rect_intersection (&transformed_clip,
&builder->current_clip.bounds,
&intersection);
gsk_rounded_rect_init_from_rect (&child_clip, &intersection, 0.0f);
prev_clip = ops_set_clip (builder, &child_clip);
gsk_gl_renderer_add_render_ops (self, child, builder);
ops_set_clip (builder, &prev_clip);
}
break;
case GSK_ROUNDED_CLIP_NODE:
{
GskRoundedRect prev_clip;
GskRenderNode *child = gsk_rounded_clip_node_get_child (node);
const GskRoundedRect *rounded_clip = gsk_rounded_clip_node_peek_clip (node);
graphene_rect_t transformed_clip;
graphene_rect_t intersection;
GskRoundedRect child_clip;
transformed_clip = rounded_clip->bounds;
graphene_matrix_transform_bounds (&builder->current_modelview, &transformed_clip, &transformed_clip);
graphene_rect_intersection (&transformed_clip, &builder->current_clip.bounds,
&intersection);
gsk_rounded_rect_init (&child_clip, &intersection,
&rounded_clip->corner[0],
&rounded_clip->corner[1],
&rounded_clip->corner[2],
&rounded_clip->corner[3]);
prev_clip = ops_set_clip (builder, &child_clip);
gsk_gl_renderer_add_render_ops (self, child, builder);
ops_set_clip (builder, &prev_clip);
}
break;
case GSK_TEXT_NODE:
{
const PangoFont *font = gsk_text_node_peek_font (node);
const PangoGlyphInfo *glyphs = gsk_text_node_peek_glyphs (node);
const gboolean has_color_glyphs = font_has_color_glyphs (font);
guint num_glyphs = gsk_text_node_get_num_glyphs (node);
int i;
int x_position = 0;
int x = gsk_text_node_get_x (node);
int y = gsk_text_node_get_y (node);
/* If the font has color glyphs, we don't need to recolor anything */
if (has_color_glyphs)
{
ops_set_program (builder, &self->blit_program);
}
else
{
RenderOp op;
ops_set_program (builder, &self->coloring_program);
op.op = OP_CHANGE_COLOR;
op.color = *gsk_text_node_peek_color (node);
ops_add (builder, &op);
}
/* We use one quad per character, unlike the other nodes which
* use at most one quad altogether */
for (i = 0; i < num_glyphs; i++)
{
const PangoGlyphInfo *gi = &glyphs[i];
const GskGLCachedGlyph *glyph;
int glyph_x, glyph_y, glyph_w, glyph_h;
float tx, ty, tx2, ty2;
double cx;
double cy;
if (gi->glyph == PANGO_GLYPH_EMPTY ||
(gi->glyph & PANGO_GLYPH_UNKNOWN_FLAG) > 0)
continue;
glyph = gsk_gl_glyph_cache_lookup (&self->glyph_cache,
TRUE,
(PangoFont *)font,
gi->glyph,
self->scale_factor);
/* e.g. whitespace */
if (glyph->draw_width <= 0 || glyph->draw_height <= 0)
{
x_position += gi->geometry.width;
continue;
}
cx = (double)(x_position + gi->geometry.x_offset) / PANGO_SCALE;
cy = (double)(gi->geometry.y_offset) / PANGO_SCALE;
ops_set_texture (builder, gsk_gl_glyph_cache_get_glyph_image (&self->glyph_cache,
glyph)->texture_id);
{
tx = glyph->tx;
ty = glyph->ty;
tx2 = tx + glyph->tw;
ty2 = ty + glyph->th;
glyph_x = x + cx + glyph->draw_x;
glyph_y = y + cy + glyph->draw_y;
glyph_w = glyph->draw_width;
glyph_h = glyph->draw_height;
GskQuadVertex vertex_data[GL_N_VERTICES] = {
{ { glyph_x, glyph_y }, { tx, ty }, },
{ { glyph_x, glyph_y + glyph_h }, { tx, ty2 }, },
{ { glyph_x + glyph_w, glyph_y }, { tx2, ty }, },
{ { glyph_x + glyph_w, glyph_y + glyph_h }, { tx2, ty2 }, },
{ { glyph_x, glyph_y + glyph_h }, { tx, ty2 }, },
{ { glyph_x + glyph_w, glyph_y }, { tx2, ty }, },
};
ops_draw (builder, vertex_data);
}
x_position += gi->geometry.width;
}
}
break;
case GSK_REPEATING_LINEAR_GRADIENT_NODE:
case GSK_BORDER_NODE:
case GSK_INSET_SHADOW_NODE:
case GSK_OUTSET_SHADOW_NODE:
case GSK_BLUR_NODE:
case GSK_SHADOW_NODE:
case GSK_CROSS_FADE_NODE:
case GSK_BLEND_NODE:
case GSK_REPEAT_NODE:
case GSK_COLOR_MATRIX_NODE:
default:
{
cairo_surface_t *surface;
cairo_t *cr;
int texture_id;
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
ceilf (node->bounds.size.width) * self->scale_factor,
ceilf (node->bounds.size.height) * self->scale_factor);
cairo_surface_set_device_scale (surface, self->scale_factor, self->scale_factor);
cr = cairo_create (surface);
cairo_save (cr);
cairo_translate (cr, -min_x, -min_y);
gsk_render_node_draw (node, cr);
cairo_restore (cr);
#if HIGHLIGHT_FALLBACK
cairo_move_to (cr, 0, 0);
cairo_rectangle (cr, 0, 0, max_x - min_x, max_y - min_y);
cairo_set_source_rgba (cr, 1, 0, 0, 1);
cairo_stroke (cr);
#endif
cairo_destroy (cr);
/* Upload the Cairo surface to a GL texture */
texture_id = gsk_gl_driver_create_texture (self->gl_driver,
node->bounds.size.width * self->scale_factor,
node->bounds.size.height * self->scale_factor);
gsk_gl_driver_bind_source_texture (self->gl_driver, texture_id);
gsk_gl_driver_init_texture_with_surface (self->gl_driver,
texture_id,
surface,
GL_NEAREST, GL_NEAREST);
cairo_surface_destroy (surface);
ops_set_program (builder, &self->blit_program);
ops_set_texture (builder, texture_id);
ops_draw (builder, vertex_data);
}
}
}
static int
add_offscreen_ops (GskGLRenderer *self,
RenderOpBuilder *builder,
float min_x,
float max_x,
float min_y,
float max_y,
GskRenderNode *child_node)
{
int texture_id;
int render_target;
int prev_render_target;
RenderOp op;
graphene_matrix_t identity;
graphene_matrix_t prev_projection;
graphene_matrix_t prev_modelview;
graphene_rect_t prev_viewport;
graphene_matrix_t item_proj;
texture_id = gsk_gl_driver_create_texture (self->gl_driver, max_x - min_x, max_y - min_y);
gsk_gl_driver_bind_source_texture (self->gl_driver, texture_id);
gsk_gl_driver_init_texture_empty (self->gl_driver, texture_id);
render_target = gsk_gl_driver_create_render_target (self->gl_driver, texture_id, TRUE, TRUE);
graphene_matrix_init_ortho (&item_proj,
min_x, max_x,
min_y, max_y,
ORTHO_NEAR_PLANE, ORTHO_FAR_PLANE);
graphene_matrix_scale (&item_proj, 1, -1, 1);
graphene_matrix_init_identity (&identity);
prev_render_target = ops_set_render_target (builder, render_target);
/* Clear since we use this rendertarget for the first time */
op.op = OP_CLEAR;
ops_add (builder, &op);
prev_projection = ops_set_projection (builder, &item_proj);
prev_modelview = ops_set_modelview (builder, &identity);
prev_viewport = ops_set_viewport (builder, &GRAPHENE_RECT_INIT (min_x, min_y, max_x - min_x, max_y - min_y));
gsk_gl_renderer_add_render_ops (self, child_node, builder);
ops_set_viewport (builder, &prev_viewport);
ops_set_modelview (builder, &prev_modelview);
ops_set_projection (builder, &prev_projection);
ops_set_render_target (builder, prev_render_target);
return texture_id;
}
static void
gsk_gl_renderer_render_ops (GskGLRenderer *self,
gsize vertex_data_size)
{
guint i;
guint n_ops = self->render_ops->len;
float mat[16];
const Program *program = NULL;
gsize buffer_index = 0;
float *vertex_data = g_malloc (vertex_data_size);
/*g_message ("%s: Buffer size: %ld", __FUNCTION__, vertex_data_size);*/
GLuint buffer_id, vao_id;
glGenVertexArrays (1, &vao_id);
glBindVertexArray (vao_id);
glGenBuffers (1, &buffer_id);
glBindBuffer (GL_ARRAY_BUFFER, buffer_id);
// Fill buffer data
for (i = 0; i < n_ops; i ++)
{
const RenderOp *op = &g_array_index (self->render_ops, RenderOp, i);
if (op->op == OP_CHANGE_VAO)
{
memcpy (vertex_data + buffer_index, &op->vertex_data, sizeof (GskQuadVertex) * GL_N_VERTICES);
buffer_index += sizeof (GskQuadVertex) * GL_N_VERTICES / sizeof (float);
}
}
// Set buffer data
glBufferData (GL_ARRAY_BUFFER, vertex_data_size, vertex_data, GL_STATIC_DRAW);
// Describe buffer contents
/* 0 = position location */
glEnableVertexAttribArray (0);
glVertexAttribPointer (0, 2, GL_FLOAT, GL_FALSE,
sizeof (GskQuadVertex),
(void *) G_STRUCT_OFFSET (GskQuadVertex, position));
/* 1 = texture coord location */
glEnableVertexAttribArray (1);
glVertexAttribPointer (1, 2, GL_FLOAT, GL_FALSE,
sizeof (GskQuadVertex),
(void *) G_STRUCT_OFFSET (GskQuadVertex, uv));
for (i = 0; i < n_ops; i ++)
{
const RenderOp *op = &g_array_index (self->render_ops, RenderOp, i);
if (op->op == OP_NONE ||
op->op == OP_CHANGE_VAO)
continue;
OP_PRINT ("Op %u: %u", i, op->op);
switch (op->op)
{
case OP_CHANGE_PROJECTION:
graphene_matrix_to_float (&op->projection, mat);
glUniformMatrix4fv (program->projection_location, 1, GL_FALSE, mat);
OP_PRINT (" -> Projection");
/*graphene_matrix_print (&op->projection);*/
break;
case OP_CHANGE_MODELVIEW:
graphene_matrix_to_float (&op->modelview, mat);
glUniformMatrix4fv (program->modelview_location, 1, GL_FALSE, mat);
OP_PRINT (" -> Modelview");
/*graphene_matrix_print (&op->modelview);*/
break;
case OP_CHANGE_PROGRAM:
program = op->program;
glUseProgram (op->program->id);
OP_PRINT (" -> Program: %d(%s)", op->program->index, op->program->name);
break;
case OP_CHANGE_RENDER_TARGET:
OP_PRINT (" -> Render Target: %d", op->render_target_id);
glBindFramebuffer (GL_FRAMEBUFFER, op->render_target_id);
if (op->render_target_id != 0)
glDisable (GL_SCISSOR_TEST);
else
gsk_gl_renderer_setup_render_mode (self); /* Reset glScissor etc. */
break;
case OP_CLEAR:
glClearColor (0, 0, 0, 0);
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
break;
case OP_CHANGE_VIEWPORT:
OP_PRINT (" -> New Viewport: %f, %f, %f, %f", op->viewport.origin.x, op->viewport.origin.y, op->viewport.size.width, op->viewport.size.height);
glUniform4f (program->viewport_location,
op->viewport.origin.x, op->viewport.origin.y,
op->viewport.size.width, op->viewport.size.height);
glViewport (0, 0, op->viewport.size.width, op->viewport.size.height);
break;
case OP_CHANGE_OPACITY:
OP_PRINT (" -> Opacity %f", op->opacity);
glUniform1f (program->alpha_location, op->opacity);
break;
case OP_CHANGE_COLOR:
OP_PRINT (" -> Color: (%f, %f, %f, %f)", op->color.red, op->color.green, op->color.blue, op->color.alpha);
g_assert (program == &self->color_program || program == &self->coloring_program);
glUniform4f (program->color_location,
op->color.red, op->color.green, op->color.blue, op->color.alpha);
break;
case OP_CHANGE_CLIP:
OP_PRINT (" -> Clip");
glUniform4f (program->clip_location,
op->clip.bounds.origin.x, op->clip.bounds.origin.y,
op->clip.bounds.size.width, op->clip.bounds.size.height);
glUniform4f (program->clip_corner_widths_location,
MAX (op->clip.corner[0].width, 1),
MAX (op->clip.corner[1].width, 1),
MAX (op->clip.corner[2].width, 1),
MAX (op->clip.corner[3].width, 1));
glUniform4f (program->clip_corner_heights_location,
MAX (op->clip.corner[0].height, 1),
MAX (op->clip.corner[1].height, 1),
MAX (op->clip.corner[2].height, 1),
MAX (op->clip.corner[3].height, 1));
break;
case OP_CHANGE_SOURCE_TEXTURE:
g_assert(op->texture_id != 0);
OP_PRINT (" -> New texture: %d", op->texture_id);
/* Use texture unit 0 for the source */
glUniform1i (program->source_location, 0);
glActiveTexture (GL_TEXTURE0);
glBindTexture (GL_TEXTURE_2D, op->texture_id);
break;
case OP_CHANGE_LINEAR_GRADIENT:
OP_PRINT (" -> Linear gradient");
glUniform1i (program->n_color_stops_location,
op->linear_gradient.n_color_stops);
glUniform4fv (program->color_stops_location,
op->linear_gradient.n_color_stops,
op->linear_gradient.color_stops);
glUniform1fv (program->color_offsets_location,
op->linear_gradient.n_color_stops,
op->linear_gradient.color_offsets);
glUniform2f (program->start_point_location,
op->linear_gradient.start_point.x, op->linear_gradient.start_point.y);
glUniform2f (program->end_point_location,
op->linear_gradient.end_point.x, op->linear_gradient.end_point.y);
break;
case OP_DRAW:
OP_PRINT (" -> draw %ld, size %ld and program %s\n",
op->draw.vao_offset, op->draw.draw_size, program->name);
glDrawArrays (GL_TRIANGLES, op->draw.vao_offset, op->draw.draw_size);//GL_N_VERTICES);
break;
default:
g_warn_if_reached ();
}
OP_PRINT ("\n");
}
/* Done drawing, destroy the buffer again.
* TODO: Can we reuse the memory, though? */
g_free (vertex_data);
}
static void
gsk_gl_renderer_do_render (GskRenderer *renderer,
GskRenderNode *root,
const graphene_rect_t *viewport,
int scale_factor)
{
GskGLRenderer *self = GSK_GL_RENDERER (renderer);
RenderOpBuilder render_op_builder;
graphene_matrix_t modelview, projection;
#ifdef G_ENABLE_DEBUG
GskProfiler *profiler;
gint64 gpu_time, cpu_time;
#endif
#ifdef G_ENABLE_DEBUG
profiler = gsk_renderer_get_profiler (renderer);
#endif
if (self->gl_context == NULL)
{
GSK_NOTE (OPENGL, g_print ("No valid GL context associated to the renderer"));
return;
}
self->viewport = *viewport;
/* Set up the modelview and projection matrices to fit our viewport */
graphene_matrix_init_scale (&modelview, scale_factor, scale_factor, 1.0);
graphene_matrix_init_ortho (&projection,
viewport->origin.x,
viewport->origin.x + viewport->size.width,
viewport->origin.y,
viewport->origin.y + viewport->size.height,
ORTHO_NEAR_PLANE,
ORTHO_FAR_PLANE);
if (self->texture_id == 0)
graphene_matrix_scale (&projection, 1, -1, 1);
gsk_gl_driver_begin_frame (self->gl_driver);
gsk_gl_glyph_cache_begin_frame (&self->glyph_cache);
memset (&render_op_builder, 0, sizeof (render_op_builder));
render_op_builder.renderer = self;
render_op_builder.current_projection = projection;
render_op_builder.current_modelview = modelview;
render_op_builder.current_viewport = *viewport;
render_op_builder.current_render_target = self->texture_id;
render_op_builder.current_opacity = 1.0f;
render_op_builder.render_ops = self->render_ops;
gsk_rounded_rect_init_from_rect (&render_op_builder.current_clip, &self->viewport, 0.0f);
gsk_gl_renderer_add_render_ops (self, root, &render_op_builder);
/*g_message ("Ops: %u", self->render_ops->len);*/
/* Now actually draw things... */
#ifdef G_ENABLE_DEBUG
gsk_gl_profiler_begin_gpu_region (self->gl_profiler);
gsk_profiler_timer_begin (profiler, self->profile_timers.cpu_time);
#endif
gsk_gl_renderer_resize_viewport (self, viewport);
gsk_gl_renderer_setup_render_mode (self);
gsk_gl_renderer_clear (self);
glEnable (GL_DEPTH_TEST);
glDepthFunc (GL_LEQUAL);
/* Pre-multiplied alpha! */
glEnable (GL_BLEND);
glBlendFunc (GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
glBlendEquation (GL_FUNC_ADD);
gsk_gl_renderer_render_ops (self, render_op_builder.buffer_size);
gsk_gl_driver_end_frame (self->gl_driver);
#ifdef G_ENABLE_DEBUG
gsk_profiler_counter_inc (profiler, self->profile_counters.frames);
cpu_time = gsk_profiler_timer_end (profiler, self->profile_timers.cpu_time);
gsk_profiler_timer_set (profiler, self->profile_timers.cpu_time, cpu_time);
gpu_time = gsk_gl_profiler_end_gpu_region (self->gl_profiler);
gsk_profiler_timer_set (profiler, self->profile_timers.gpu_time, gpu_time);
gsk_profiler_push_samples (profiler);
#endif
}
static GdkTexture *
gsk_gl_renderer_render_texture (GskRenderer *renderer,
GskRenderNode *root,
const graphene_rect_t *viewport)
{
GskGLRenderer *self = GSK_GL_RENDERER (renderer);
GdkTexture *texture;
int stride;
guchar *data;
int width, height;
g_return_val_if_fail (self->gl_context != NULL, NULL);
self->render_mode = RENDER_FULL;
width = ceilf (viewport->size.width);
height = ceilf (viewport->size.height);
gdk_gl_context_make_current (self->gl_context);
/* Prepare our framebuffer */
gsk_gl_driver_begin_frame (self->gl_driver);
gsk_gl_renderer_create_buffers (self, width, height, 1);
gsk_gl_renderer_clear (self);
gsk_gl_driver_end_frame (self->gl_driver);
/* Render the actual scene */
gsk_gl_renderer_do_render (renderer, root, viewport, 1);
/* Prepare memory for the glReadPixels call */
stride = cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32, width);
data = g_malloc (height * stride);
/* Bind our framebuffer again and read from it */
gsk_gl_driver_begin_frame (self->gl_driver);
gsk_gl_driver_bind_render_target (self->gl_driver, self->texture_id);
glReadPixels (0, 0, width, height, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, data);
gsk_gl_driver_end_frame (self->gl_driver);
/* Create texture from the downloaded data */
texture = gdk_texture_new_for_data (data, width, height, stride);
return texture;
}
static void
gsk_gl_renderer_render (GskRenderer *renderer,
GskRenderNode *root)
{
GskGLRenderer *self = GSK_GL_RENDERER (renderer);
GdkWindow *window = gsk_renderer_get_window (renderer);
graphene_rect_t viewport;
if (self->gl_context == NULL)
return;
gdk_gl_context_make_current (self->gl_context);
viewport.origin.x = 0;
viewport.origin.y = 0;
viewport.size.width = gdk_window_get_width (window) * self->scale_factor;
viewport.size.height = gdk_window_get_height (window) * self->scale_factor;
gsk_gl_renderer_do_render (renderer, root, &viewport, self->scale_factor);
gdk_gl_context_make_current (self->gl_context);
gsk_gl_renderer_clear_tree (self);
gsk_gl_renderer_destroy_buffers (self);
}
static void
gsk_gl_renderer_class_init (GskGLRendererClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GskRendererClass *renderer_class = GSK_RENDERER_CLASS (klass);
gobject_class->dispose = gsk_gl_renderer_dispose;
renderer_class->realize = gsk_gl_renderer_realize;
renderer_class->unrealize = gsk_gl_renderer_unrealize;
renderer_class->begin_draw_frame = gsk_gl_renderer_begin_draw_frame;
renderer_class->render = gsk_gl_renderer_render;
renderer_class->render_texture = gsk_gl_renderer_render_texture;
}
static void
gsk_gl_renderer_init (GskGLRenderer *self)
{
gsk_ensure_resources ();
self->scale_factor = 1;
self->render_ops = g_array_new (TRUE, FALSE, sizeof (RenderOp));
#ifdef G_ENABLE_DEBUG
{
GskProfiler *profiler = gsk_renderer_get_profiler (GSK_RENDERER (self));
self->profile_counters.frames = gsk_profiler_add_counter (profiler, "frames", "Frames", FALSE);
self->profile_counters.draw_calls = gsk_profiler_add_counter (profiler, "draws", "glDrawArrays", TRUE);
self->profile_timers.cpu_time = gsk_profiler_add_timer (profiler, "cpu-time", "CPU time", FALSE, TRUE);
self->profile_timers.gpu_time = gsk_profiler_add_timer (profiler, "gpu-time", "GPU time", FALSE, TRUE);
}
#endif
}
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