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gl: Move vertex buffer handling from setup into context

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We can only emit one vertex buffer at a time anyway.
This commit is contained in:
Benjamin Otte 2010-05-19 21:10:26 +02:00
parent 0d5f2eab77
commit 5b8b1fe1cb
2 changed files with 22 additions and 20 deletions
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34
src/cairo-gl-composite.c
View file

@ -1097,7 +1097,7 @@ _cairo_gl_composite_begin (cairo_gl_context_t *ctx,
src_size = _cairo_gl_operand_get_vertex_size (setup->src.type);
mask_size = _cairo_gl_operand_get_vertex_size (setup->mask.type);
setup->vertex_size = dst_size + src_size + mask_size;
ctx->vertex_size = dst_size + src_size + mask_size;
_cairo_gl_context_set_destination (ctx, setup->dst);
_cairo_gl_set_operator (setup->dst,
@ -1111,13 +1111,13 @@ _cairo_gl_composite_begin (cairo_gl_context_t *ctx,
glBindBufferARB (GL_ARRAY_BUFFER_ARB, ctx->vbo);
glVertexPointer (2, GL_FLOAT, setup->vertex_size, NULL);
glVertexPointer (2, GL_FLOAT, ctx->vertex_size, NULL);
glEnableClientState (GL_VERTEX_ARRAY);
_cairo_gl_set_src_operand (ctx, setup);
if (setup->src.type == CAIRO_GL_OPERAND_TEXTURE) {
glClientActiveTexture (GL_TEXTURE0);
glTexCoordPointer (2, GL_FLOAT, setup->vertex_size,
glTexCoordPointer (2, GL_FLOAT, ctx->vertex_size,
(void *) (uintptr_t) dst_size);
glEnableClientState (GL_TEXTURE_COORD_ARRAY);
}
@ -1128,11 +1128,11 @@ _cairo_gl_composite_begin (cairo_gl_context_t *ctx,
if (setup->mask.type == CAIRO_GL_OPERAND_TEXTURE) {
glClientActiveTexture (GL_TEXTURE1);
glTexCoordPointer (2, GL_FLOAT, setup->vertex_size,
glTexCoordPointer (2, GL_FLOAT, ctx->vertex_size,
(void *) (uintptr_t) (dst_size + src_size));
glEnableClientState (GL_TEXTURE_COORD_ARRAY);
} else if (setup->mask.type == CAIRO_GL_OPERAND_SPANS) {
glColorPointer (4, GL_UNSIGNED_BYTE, setup->vertex_size,
glColorPointer (4, GL_UNSIGNED_BYTE, ctx->vertex_size,
(void *) (uintptr_t) (dst_size + src_size));
glEnableClientState (GL_COLOR_ARRAY);
}
@ -1147,7 +1147,7 @@ static inline void
_cairo_gl_composite_draw (cairo_gl_context_t *ctx,
cairo_gl_composite_t *setup)
{
unsigned int count = setup->vb_offset / setup->vertex_size;
unsigned int count = ctx->vb_offset / ctx->vertex_size;
if (! setup->pre_shader) {
glDrawArrays (GL_TRIANGLES, 0, count);
@ -1172,7 +1172,7 @@ void
_cairo_gl_composite_flush (cairo_gl_context_t *ctx,
cairo_gl_composite_t *setup)
{
if (setup->vb_offset == 0)
if (ctx->vb_offset == 0)
return;
if (setup->clip_region) {
@ -1191,7 +1191,8 @@ _cairo_gl_composite_flush (cairo_gl_context_t *ctx,
}
glUnmapBufferARB (GL_ARRAY_BUFFER_ARB);
setup->vb = NULL;
ctx->vb = NULL;
ctx->vb_offset = 0;
}
static void
@ -1199,14 +1200,13 @@ _cairo_gl_composite_prepare_buffer (cairo_gl_context_t *ctx,
cairo_gl_composite_t *setup,
unsigned int n_vertices)
{
if (setup->vb_offset + n_vertices * setup->vertex_size > CAIRO_GL_VBO_SIZE)
if (ctx->vb_offset + n_vertices * ctx->vertex_size > CAIRO_GL_VBO_SIZE)
_cairo_gl_composite_flush (ctx, setup);
if (setup->vb == NULL) {
if (ctx->vb == NULL) {
glBufferDataARB (GL_ARRAY_BUFFER_ARB, CAIRO_GL_VBO_SIZE,
NULL, GL_STREAM_DRAW_ARB);
setup->vb = glMapBufferARB (GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
setup->vb_offset = 0;
ctx->vb = glMapBufferARB (GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
}
}
@ -1258,7 +1258,7 @@ _cairo_gl_composite_emit_vertex (cairo_gl_context_t *ctx,
GLfloat y,
uint32_t color)
{
GLfloat *vb = (GLfloat *) (void *) &setup->vb[setup->vb_offset];
GLfloat *vb = (GLfloat *) (void *) &ctx->vb[ctx->vb_offset];
*vb++ = x;
*vb++ = y;
@ -1266,7 +1266,7 @@ _cairo_gl_composite_emit_vertex (cairo_gl_context_t *ctx,
_cairo_gl_operand_emit (&setup->src, &vb, x, y, color);
_cairo_gl_operand_emit (&setup->mask, &vb, x, y, color);
setup->vb_offset += setup->vertex_size;
ctx->vb_offset += ctx->vertex_size;
}
void
@ -1297,7 +1297,7 @@ _cairo_gl_composite_emit_glyph_vertex (cairo_gl_context_t *ctx,
GLfloat glyph_x,
GLfloat glyph_y)
{
GLfloat *vb = (GLfloat *) (void *) &setup->vb[setup->vb_offset];
GLfloat *vb = (GLfloat *) (void *) &ctx->vb[ctx->vb_offset];
*vb++ = x;
*vb++ = y;
@ -1307,7 +1307,7 @@ _cairo_gl_composite_emit_glyph_vertex (cairo_gl_context_t *ctx,
*vb++ = glyph_x;
*vb++ = glyph_y;
setup->vb_offset += setup->vertex_size;
ctx->vb_offset += ctx->vertex_size;
}
void
@ -1363,6 +1363,8 @@ _cairo_gl_composite_end (cairo_gl_context_t *ctx,
glDisable (ctx->tex_target);
setup->pre_shader = NULL;
ctx->vertex_size = 0;
}
void

8
src/cairo-gl-private.h
View file

@ -145,6 +145,10 @@ typedef struct _cairo_gl_context {
cairo_gl_surface_t *current_target;
cairo_gl_shader_t *current_shader;
char *vb;
unsigned int vb_offset;
unsigned int vertex_size;
void (*acquire) (void *ctx);
void (*release) (void *ctx);
@ -195,10 +199,6 @@ typedef struct _cairo_gl_composite {
cairo_gl_operand_t src;
cairo_gl_operand_t mask;
cairo_gl_shader_t *pre_shader; /* for component alpha */
char *vb;
unsigned int vb_offset;
unsigned int vertex_size;
} cairo_gl_composite_t;
cairo_private extern const cairo_surface_backend_t _cairo_gl_surface_backend;