diff options
Diffstat (limited to 'src/mesa/state_tracker')
| -rw-r--r-- | src/mesa/state_tracker/st_cb_drawpixels.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/src/mesa/state_tracker/st_cb_drawpixels.c b/src/mesa/state_tracker/st_cb_drawpixels.c index 1a45c0fed39..94b80f69f28 100644 --- a/src/mesa/state_tracker/st_cb_drawpixels.c +++ b/src/mesa/state_tracker/st_cb_drawpixels.c @@ -162,14 +162,15 @@ combined_drawpix_fragment_program(struct gl_context *ctx) /** - * Create fragment shader that does a TEX() instruction to get a Z - * value, then writes to FRAG_RESULT_DEPTH. + * Create fragment shader that does a TEX() instruction to get a Z and/or + * stencil value value, then writes to FRAG_RESULT_DEPTH/FRAG_RESULT_STENCIL. + * Used for glDrawPixels(GL_DEPTH_COMPONENT / GL_STENCIL_INDEX). * Pass fragment color through as-is. * \return pointer to the Gallium driver fragment shader */ static void * -make_fragment_shader_z(struct st_context *st, GLboolean write_depth, - GLboolean write_stencil) +make_fragment_shader_z_stencil(struct st_context *st, GLboolean write_depth, + GLboolean write_stencil) { struct gl_context *ctx = st->ctx; struct gl_program *p; @@ -663,6 +664,10 @@ draw_textured_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z, } +/** + * Software fallback to do glDrawPixels(GL_STENCIL_INDEX) when we + * can't use a fragment shader to write stencil values. + */ static void draw_stencil_pixels(struct gl_context *ctx, GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, @@ -860,7 +865,7 @@ st_DrawPixels(struct gl_context *ctx, GLint x, GLint y, st_validate_state(st); if (write_depth || write_stencil) { - driver_fp = make_fragment_shader_z(st, write_depth, write_stencil); + driver_fp = make_fragment_shader_z_stencil(st, write_depth, write_stencil); driver_vp = make_passthrough_vertex_shader(st, GL_TRUE); color = ctx->Current.RasterColor; } @@ -912,6 +917,9 @@ stencil_fallback: +/** + * Software fallback for glCopyPixels(GL_STENCIL). + */ static void copy_stencil_pixels(struct gl_context *ctx, GLint srcx, GLint srcy, GLsizei width, GLsizei height, @@ -1062,7 +1070,7 @@ st_CopyPixels(struct gl_context *ctx, GLint srcx, GLint srcy, assert(type == GL_DEPTH); rbRead = st_renderbuffer(ctx->ReadBuffer->_DepthBuffer); color = ctx->Current.Attrib[VERT_ATTRIB_COLOR0]; - driver_fp = make_fragment_shader_z(st, GL_TRUE, GL_FALSE); + driver_fp = make_fragment_shader_z_stencil(st, GL_TRUE, GL_FALSE); driver_vp = make_passthrough_vertex_shader(st, GL_TRUE); } |