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[gl] Make the VBO once at startup instead of recreating per glyphs/spans.

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This shaves 2% off of firefox-talos-gfx.
This commit is contained in:
Eric Anholt 2010-02-05 07:25:04 -08:00
parent 696a715702
commit b028d287e6
3 changed files with 6 additions and 13 deletions
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10
src/cairo-gl-glyphs.c
View file

@ -457,7 +457,6 @@ _render_glyphs (cairo_gl_surface_t *dst,
cairo_gl_composite_setup_t composite_setup;
cairo_status_t status;
int i = 0;
GLuint vbo = 0;
*has_component_alpha = FALSE;
@ -505,8 +504,7 @@ _render_glyphs (cairo_gl_surface_t *dst,
setup.op = op;
setup.in = CAIRO_GL_SHADER_IN_COUNT; /* unset */
glGenBuffersARB (1, &vbo);
glBindBufferARB (GL_ARRAY_BUFFER_ARB, vbo);
glBindBufferARB (GL_ARRAY_BUFFER_ARB, ctx->vbo);
glVertexPointer (2, GL_FLOAT, setup.vertex_size * sizeof (GLfloat),
(void *)(uintptr_t)(0));
@ -622,11 +620,7 @@ _render_glyphs (cairo_gl_surface_t *dst,
glDisable (GL_TEXTURE_2D);
_cairo_gl_use_program (NULL);
if (vbo != 0) {
glBindBufferARB (GL_ARRAY_BUFFER_ARB, 0);
glDeleteBuffersARB (1, &vbo);
}
glBindBufferARB (GL_ARRAY_BUFFER_ARB, 0);
_cairo_gl_context_release (ctx);
_cairo_gl_operand_destroy (&composite_setup.src);

1
src/cairo-gl-private.h
View file

@ -119,6 +119,7 @@ typedef struct _cairo_gl_context {
GLuint dummy_tex;
GLuint texture_load_pbo;
GLuint vbo;
GLint max_framebuffer_size;
GLint max_texture_size;
cairo_bool_t using_glsl;

8
src/cairo-gl-surface.c
View file

@ -139,6 +139,7 @@ _cairo_gl_context_init (cairo_gl_context_t *ctx)
/* PBO for any sort of texture upload */
glGenBuffersARB (1, &ctx->texture_load_pbo);
glGenBuffersARB (1, &ctx->vbo);
ctx->max_framebuffer_size = 0;
glGetIntegerv (GL_MAX_RENDERBUFFER_SIZE, &ctx->max_framebuffer_size);
@ -2481,7 +2482,6 @@ typedef struct _cairo_gl_surface_span_renderer {
cairo_gl_context_t *ctx;
cairo_region_t *clip;
GLuint vbo;
void *vbo_base;
unsigned int vbo_size;
unsigned int vbo_offset;
@ -2525,10 +2525,9 @@ _cairo_gl_span_renderer_get_vbo (cairo_gl_surface_span_renderer_t *renderer,
{
unsigned int offset;
if (renderer->vbo == 0) {
if (renderer->vbo_size == 0) {
renderer->vbo_size = 16384;
glGenBuffersARB (1, &renderer->vbo);
glBindBufferARB (GL_ARRAY_BUFFER_ARB, renderer->vbo);
glBindBufferARB (GL_ARRAY_BUFFER_ARB, renderer->ctx->vbo);
if (renderer->setup.src.type == OPERAND_TEXTURE)
renderer->vertex_size = 4 * sizeof (float) + sizeof (uint32_t);
@ -2701,7 +2700,6 @@ _cairo_gl_surface_span_renderer_finish (void *abstract_renderer)
_cairo_gl_span_renderer_flush (renderer);
glBindBufferARB (GL_ARRAY_BUFFER_ARB, 0);
glDeleteBuffersARB (1, &renderer->vbo);
glDisableClientState (GL_VERTEX_ARRAY);
glDisableClientState (GL_COLOR_ARRAY);