diff options
| -rw-r--r-- | src/mesa/state_tracker/st_cb_drawpixels.c | 85 |
1 files changed, 83 insertions, 2 deletions
diff --git a/src/mesa/state_tracker/st_cb_drawpixels.c b/src/mesa/state_tracker/st_cb_drawpixels.c index 15abc8550be..92705cdc441 100644 --- a/src/mesa/state_tracker/st_cb_drawpixels.c +++ b/src/mesa/state_tracker/st_cb_drawpixels.c @@ -32,6 +32,7 @@ #include "main/imports.h" #include "main/image.h" +#include "main/macros.h" #include "st_context.h" #include "st_atom.h" @@ -720,6 +721,81 @@ draw_blit(struct st_context *st, } +static void +draw_stencil_pixels(GLcontext *ctx, GLint x, GLint y, + GLsizei width, GLsizei height, GLenum type, + const struct gl_pixelstore_attrib *unpack, + const GLvoid *pixels) +{ + struct st_context *st = ctx->st; + struct pipe_context *pipe = st->pipe; + struct pipe_surface *ps = st->state.framebuffer.sbuf; + const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0; + GLint skipPixels; + ubyte *stmap; + + /* map the stencil buffer */ + stmap = pipe->region_map(pipe, ps->region); + + /* if width > MAX_WIDTH, have to process image in chunks */ + skipPixels = 0; + while (skipPixels < width) { + const GLint spanX = x + skipPixels; + const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH); + GLint row; + for (row = 0; row < height; row++) { + GLint spanY = y + row; + GLubyte values[MAX_WIDTH]; + GLenum destType = GL_UNSIGNED_BYTE; + const GLvoid *source = _mesa_image_address2d(unpack, pixels, + width, height, + GL_COLOR_INDEX, type, + row, skipPixels); + _mesa_unpack_stencil_span(ctx, spanWidth, destType, values, + type, source, unpack, + ctx->_ImageTransferState); + if (zoom) { + /* + _swrast_write_zoomed_stencil_span(ctx, x, y, spanWidth, + spanX, spanY, values); + */ + } + else { + if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { + spanY = ctx->DrawBuffer->Height - spanY - 1; + } + + switch (ps->format) { + case PIPE_FORMAT_U_S8: + { + ubyte *dest = stmap + spanY * ps->region->pitch + spanX; + memcpy(dest, values, spanWidth); + } + break; + case PIPE_FORMAT_S8_Z24: + { + uint *dest = (uint *) stmap + spanY * ps->region->pitch + spanX; + GLint k; + for (k = 0; k < spanWidth; k++) { + uint p = dest[k]; + p = (p & 0xffffff) | (values[k] << 24); + dest[k] = p; + } + } + break; + default: + assert(0); + } + } + } + skipPixels += spanWidth; + } + + /* unmap the stencil buffer */ + pipe->region_unmap(pipe, ps->region); +} + + /** * Called via ctx->Driver.DrawPixels() */ @@ -739,7 +815,12 @@ st_DrawPixels(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, GLuint bufferFormat; const GLfloat *color; - /* create the fragment program if needed */ + if (format == GL_STENCIL_INDEX) { + draw_stencil_pixels(ctx, x, y, width, height, type, unpack, pixels); + return; + } + + /* create the fragment programs if needed */ if (!stfp_c) { stfp_c = make_fragment_shader(ctx->st, GL_FALSE); } @@ -747,7 +828,7 @@ st_DrawPixels(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, stfp_z = make_fragment_shader_z(ctx->st); } - /* and vertex program */ + /* and vertex programs */ if (!stvp_t) { stvp_t = make_vertex_shader(ctx->st, GL_FALSE); } |