static struct vg_shader * setup_lookup_single(struct vg_context *ctx, void *user_data)
{
char buffer[1024];
VGImageChannel channel = (VGImageChannel)(user_data);
struct vg_shader *shader;
switch(channel) {
case VG_RED:
util_snprintf(buffer, 1023, lookup_single_asm, "xxxx");
break;
case VG_GREEN:
util_snprintf(buffer, 1023, lookup_single_asm, "yyyy");
break;
case VG_BLUE:
util_snprintf(buffer, 1023, lookup_single_asm, "zzzz");
break;
case VG_ALPHA:
util_snprintf(buffer, 1023, lookup_single_asm, "wwww");
break;
default:
debug_assert(!"Unknown color channel");
}
shader = shader_create_from_text(ctx->pipe, buffer, 200,
PIPE_SHADER_FRAGMENT);
return shader;
}
static struct vg_shader * setup_color_matrix(struct vg_context *ctx, void *user_data)
{
struct vg_shader *shader =
shader_create_from_text(ctx->pipe, color_matrix_asm, 200,
PIPE_SHADER_FRAGMENT);
return shader;
}
void * vg_texture_vs(struct vg_context *ctx)
{
if (!ctx->texture_vs) {
ctx->texture_vs = shader_create_from_text(ctx->pipe,
vs_texture_asm,
200,
PIPE_SHADER_VERTEX);
}
return ctx->texture_vs->driver;
}
static struct vg_shader * setup_convolution(struct vg_context *ctx, void *user_data)
{
char buffer[1024];
VGint num_consts = (VGint)(long)(user_data);
struct vg_shader *shader;
util_snprintf(buffer, 1023, convolution_asm, num_consts, num_consts / 2 + 1);
shader = shader_create_from_text(ctx->pipe, buffer, 200,
PIPE_SHADER_FRAGMENT);
return shader;
}
static void update_clip_state(struct vg_context *ctx)
{
struct pipe_depth_stencil_alpha_state *dsa = &ctx->state.g3d.dsa;
struct vg_state *state = &ctx->state.vg;
memset(dsa, 0, sizeof(struct pipe_depth_stencil_alpha_state));
if (state->scissoring) {
struct pipe_blend_state *blend = &ctx->state.g3d.blend;
struct pipe_framebuffer_state *fb = &ctx->state.g3d.fb;
int i;
dsa->depth.writemask = 1;/*glDepthMask(TRUE);*/
dsa->depth.func = PIPE_FUNC_ALWAYS;
dsa->depth.enabled = 1;
cso_save_blend(ctx->cso_context);
cso_save_fragment_shader(ctx->cso_context);
/* set a passthrough shader */
if (!ctx->pass_through_depth_fs)
ctx->pass_through_depth_fs = shader_create_from_text(ctx->pipe,
pass_through_depth_asm,
40,
PIPE_SHADER_FRAGMENT);
cso_set_fragment_shader_handle(ctx->cso_context,
ctx->pass_through_depth_fs->driver);
cso_set_depth_stencil_alpha(ctx->cso_context, dsa);
ctx->pipe->clear(ctx->pipe, PIPE_CLEAR_DEPTHSTENCIL, NULL, 1.0, 0);
/* disable color writes */
blend->rt[0].colormask = 0; /*disable colorwrites*/
cso_set_blend(ctx->cso_context, blend);
/* enable scissoring */
for (i = 0; i < state->scissor_rects_num; ++i) {
const float x = state->scissor_rects[i * 4 + 0].f;
const float y = state->scissor_rects[i * 4 + 1].f;
const float width = state->scissor_rects[i * 4 + 2].f;
const float height = state->scissor_rects[i * 4 + 3].f;
VGfloat minx, miny, maxx, maxy;
minx = 0;
miny = 0;
maxx = fb->width;
maxy = fb->height;
if (x > minx)
minx = x;
if (y > miny)
miny = y;
if (x + width < maxx)
maxx = x + width;
if (y + height < maxy)
maxy = y + height;
/* check for null space */
if (minx >= maxx || miny >= maxy)
minx = miny = maxx = maxy = 0;
/*glClear(GL_DEPTH_BUFFER_BIT);*/
renderer_draw_quad(ctx->renderer, minx, miny, maxx, maxy, 0.0f);
}
cso_restore_blend(ctx->cso_context);
cso_restore_fragment_shader(ctx->cso_context);
dsa->depth.enabled = 1; /* glEnable(GL_DEPTH_TEST); */
dsa->depth.writemask = 0;/*glDepthMask(FALSE);*/
dsa->depth.func = PIPE_FUNC_GEQUAL;
}
}
