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cogl: Add function cogl_2d_primitives_immediate

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For use in batching multiple primitives as a single GL upload.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/969
This commit is contained in:
Daniel van Vugt 2019-12-13 15:39:25 +08:00
parent 67d9995280
commit 99cc435730
2 changed files with 40 additions and 21 deletions
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7
cogl/cogl/cogl-primitives-private.h
View File

@ -47,6 +47,13 @@ _cogl_rectangle_immediate (CoglFramebuffer *framebuffer,
float x_2,
float y_2);
void
cogl_2d_primitives_immediate (CoglFramebuffer *framebuffer,
CoglPipeline *pipeline,
CoglVerticesMode mode,
const CoglVertexP2 *vertices,
unsigned int n_vertices);
typedef struct _CoglMultiTexturedRect
{
const float *position; /* x0,y0,x1,y1 */

52
cogl/cogl/cogl-primitives.c
View File

@ -708,42 +708,31 @@ _cogl_framebuffer_draw_multitextured_rectangles (
}
void
_cogl_rectangle_immediate (CoglFramebuffer *framebuffer,
cogl_2d_primitives_immediate (CoglFramebuffer *framebuffer,
CoglPipeline *pipeline,
float x_1,
float y_1,
float x_2,
float y_2)
CoglVerticesMode mode,
const CoglVertexP2 *vertices,
unsigned int n_vertices)
{
/* Draw a rectangle using the vertex array API to avoid going
through the journal. This should only be used in cases where the
code might be called while the journal is already being flushed
such as when flushing the clip state */
CoglContext *ctx = framebuffer->context;
float vertices[8] =
{
x_1, y_1,
x_1, y_2,
x_2, y_1,
x_2, y_2
};
CoglAttributeBuffer *attribute_buffer;
CoglAttribute *attributes[1];
size_t vertices_size = sizeof (CoglVertexP2) * n_vertices;
attribute_buffer =
cogl_attribute_buffer_new (ctx, sizeof (vertices), vertices);
cogl_attribute_buffer_new (ctx, vertices_size, vertices);
attributes[0] = cogl_attribute_new (attribute_buffer,
"cogl_position_in",
sizeof (float) * 2, /* stride */
sizeof (CoglVertexP2), /* stride */
0, /* offset */
2, /* n_components */
COGL_ATTRIBUTE_TYPE_FLOAT);
_cogl_framebuffer_draw_attributes (framebuffer,
pipeline,
COGL_VERTICES_MODE_TRIANGLE_STRIP,
mode,
0, /* first_index */
4, /* n_vertices */
n_vertices,
attributes,
1,
COGL_DRAW_SKIP_JOURNAL_FLUSH |
@ -754,3 +743,26 @@ _cogl_rectangle_immediate (CoglFramebuffer *framebuffer,
cogl_object_unref (attributes[0]);
cogl_object_unref (attribute_buffer);
}
void
_cogl_rectangle_immediate (CoglFramebuffer *framebuffer,
CoglPipeline *pipeline,
float x_1,
float y_1,
float x_2,
float y_2)
{
CoglVertexP2 vertices[4] =
{
{x_1, y_1},
{x_1, y_2},
{x_2, y_1},
{x_2, y_2}
};
cogl_2d_primitives_immediate (framebuffer,
pipeline,
COGL_VERTICES_MODE_TRIANGLE_STRIP,
vertices,
4);
}