| /* |
| * Mesa 3-D graphics library |
| * Version: 7.1 |
| * |
| * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included |
| * in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
| * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| |
| #include "main/glheader.h" |
| #include "main/bufferobj.h" |
| #include "main/colormac.h" |
| #include "main/condrender.h" |
| #include "main/context.h" |
| #include "main/format_pack.h" |
| #include "main/image.h" |
| #include "main/imports.h" |
| #include "main/macros.h" |
| #include "main/pack.h" |
| #include "main/pbo.h" |
| #include "main/pixeltransfer.h" |
| #include "main/state.h" |
| |
| #include "s_context.h" |
| #include "s_span.h" |
| #include "s_stencil.h" |
| #include "s_zoom.h" |
| |
| |
| /** |
| * Handle a common case of drawing GL_RGB/GL_UNSIGNED_BYTE into a |
| * MESA_FORMAT_XRGB888 or MESA_FORMAT_ARGB888 renderbuffer. |
| */ |
| static void |
| fast_draw_rgb_ubyte_pixels(struct gl_context *ctx, |
| struct gl_renderbuffer *rb, |
| GLint x, GLint y, |
| GLsizei width, GLsizei height, |
| const struct gl_pixelstore_attrib *unpack, |
| const GLvoid *pixels) |
| { |
| const GLubyte *src = (const GLubyte *) |
| _mesa_image_address2d(unpack, pixels, width, |
| height, GL_RGB, GL_UNSIGNED_BYTE, 0, 0); |
| const GLint srcRowStride = _mesa_image_row_stride(unpack, width, |
| GL_RGB, GL_UNSIGNED_BYTE); |
| GLint i, j; |
| GLubyte *dst; |
| GLint dstRowStride; |
| |
| ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, |
| GL_MAP_WRITE_BIT, &dst, &dstRowStride); |
| |
| if (!dst) { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels"); |
| return; |
| } |
| |
| if (ctx->Pixel.ZoomY == -1.0f) { |
| dst = dst + (height - 1) * dstRowStride; |
| dstRowStride = -dstRowStride; |
| } |
| |
| for (i = 0; i < height; i++) { |
| GLuint *dst4 = (GLuint *) dst; |
| for (j = 0; j < width; j++) { |
| dst4[j] = PACK_COLOR_8888(0xff, src[j*3+0], src[j*3+1], src[j*3+2]); |
| } |
| dst += dstRowStride; |
| src += srcRowStride; |
| } |
| |
| ctx->Driver.UnmapRenderbuffer(ctx, rb); |
| } |
| |
| |
| /** |
| * Handle a common case of drawing GL_RGBA/GL_UNSIGNED_BYTE into a |
| * MESA_FORMAT_ARGB888 or MESA_FORMAT_xRGB888 renderbuffer. |
| */ |
| static void |
| fast_draw_rgba_ubyte_pixels(struct gl_context *ctx, |
| struct gl_renderbuffer *rb, |
| GLint x, GLint y, |
| GLsizei width, GLsizei height, |
| const struct gl_pixelstore_attrib *unpack, |
| const GLvoid *pixels) |
| { |
| const GLubyte *src = (const GLubyte *) |
| _mesa_image_address2d(unpack, pixels, width, |
| height, GL_RGBA, GL_UNSIGNED_BYTE, 0, 0); |
| const GLint srcRowStride = |
| _mesa_image_row_stride(unpack, width, GL_RGBA, GL_UNSIGNED_BYTE); |
| GLint i, j; |
| GLubyte *dst; |
| GLint dstRowStride; |
| |
| ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, |
| GL_MAP_WRITE_BIT, &dst, &dstRowStride); |
| |
| if (!dst) { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels"); |
| return; |
| } |
| |
| if (ctx->Pixel.ZoomY == -1.0f) { |
| dst = dst + (height - 1) * dstRowStride; |
| dstRowStride = -dstRowStride; |
| } |
| |
| for (i = 0; i < height; i++) { |
| GLuint *dst4 = (GLuint *) dst; |
| for (j = 0; j < width; j++) { |
| dst4[j] = PACK_COLOR_8888(src[j*4+3], src[j*4+0], |
| src[j*4+1], src[j*4+2]); |
| } |
| dst += dstRowStride; |
| src += srcRowStride; |
| } |
| |
| ctx->Driver.UnmapRenderbuffer(ctx, rb); |
| } |
| |
| |
| /** |
| * Handle a common case of drawing a format/type combination that |
| * exactly matches the renderbuffer format. |
| */ |
| static void |
| fast_draw_generic_pixels(struct gl_context *ctx, |
| struct gl_renderbuffer *rb, |
| GLint x, GLint y, |
| GLsizei width, GLsizei height, |
| GLenum format, GLenum type, |
| const struct gl_pixelstore_attrib *unpack, |
| const GLvoid *pixels) |
| { |
| const GLubyte *src = (const GLubyte *) |
| _mesa_image_address2d(unpack, pixels, width, |
| height, format, type, 0, 0); |
| const GLint srcRowStride = |
| _mesa_image_row_stride(unpack, width, format, type); |
| const GLint rowLength = width * _mesa_get_format_bytes(rb->Format); |
| GLint i; |
| GLubyte *dst; |
| GLint dstRowStride; |
| |
| ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, |
| GL_MAP_WRITE_BIT, &dst, &dstRowStride); |
| |
| if (!dst) { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels"); |
| return; |
| } |
| |
| if (ctx->Pixel.ZoomY == -1.0f) { |
| dst = dst + (height - 1) * dstRowStride; |
| dstRowStride = -dstRowStride; |
| } |
| |
| for (i = 0; i < height; i++) { |
| memcpy(dst, src, rowLength); |
| dst += dstRowStride; |
| src += srcRowStride; |
| } |
| |
| ctx->Driver.UnmapRenderbuffer(ctx, rb); |
| } |
| |
| |
| /** |
| * Try to do a fast and simple RGB(a) glDrawPixels. |
| * Return: GL_TRUE if success, GL_FALSE if slow path must be used instead |
| */ |
| static GLboolean |
| fast_draw_rgba_pixels(struct gl_context *ctx, GLint x, GLint y, |
| GLsizei width, GLsizei height, |
| GLenum format, GLenum type, |
| const struct gl_pixelstore_attrib *userUnpack, |
| const GLvoid *pixels) |
| { |
| struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0]; |
| SWcontext *swrast = SWRAST_CONTEXT(ctx); |
| struct gl_pixelstore_attrib unpack; |
| |
| if (!rb) |
| return GL_TRUE; /* no-op */ |
| |
| if (ctx->DrawBuffer->_NumColorDrawBuffers > 1 || |
| (swrast->_RasterMask & ~CLIP_BIT) || |
| ctx->Texture._EnabledCoordUnits || |
| userUnpack->SwapBytes || |
| ctx->Pixel.ZoomX != 1.0f || |
| fabsf(ctx->Pixel.ZoomY) != 1.0f || |
| ctx->_ImageTransferState) { |
| /* can't handle any of those conditions */ |
| return GL_FALSE; |
| } |
| |
| unpack = *userUnpack; |
| |
| /* clipping */ |
| if (!_mesa_clip_drawpixels(ctx, &x, &y, &width, &height, &unpack)) { |
| /* image was completely clipped: no-op, all done */ |
| return GL_TRUE; |
| } |
| |
| if (format == GL_RGB && |
| type == GL_UNSIGNED_BYTE && |
| (rb->Format == MESA_FORMAT_XRGB8888 || |
| rb->Format == MESA_FORMAT_ARGB8888)) { |
| fast_draw_rgb_ubyte_pixels(ctx, rb, x, y, width, height, |
| &unpack, pixels); |
| return GL_TRUE; |
| } |
| |
| if (format == GL_RGBA && |
| type == GL_UNSIGNED_BYTE && |
| (rb->Format == MESA_FORMAT_XRGB8888 || |
| rb->Format == MESA_FORMAT_ARGB8888)) { |
| fast_draw_rgba_ubyte_pixels(ctx, rb, x, y, width, height, |
| &unpack, pixels); |
| return GL_TRUE; |
| } |
| |
| if (_mesa_format_matches_format_and_type(rb->Format, format, type, |
| ctx->Unpack.SwapBytes)) { |
| fast_draw_generic_pixels(ctx, rb, x, y, width, height, |
| format, type, &unpack, pixels); |
| return GL_TRUE; |
| } |
| |
| /* can't handle this pixel format and/or data type */ |
| return GL_FALSE; |
| } |
| |
| |
| |
| /* |
| * Draw stencil image. |
| */ |
| static void |
| draw_stencil_pixels( struct gl_context *ctx, GLint x, GLint y, |
| GLsizei width, GLsizei height, |
| GLenum type, |
| const struct gl_pixelstore_attrib *unpack, |
| const GLvoid *pixels ) |
| { |
| const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0; |
| const GLenum destType = GL_UNSIGNED_BYTE; |
| GLint row; |
| GLubyte *values; |
| |
| values = (GLubyte *) malloc(width * sizeof(GLubyte)); |
| if (!values) { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels"); |
| return; |
| } |
| |
| for (row = 0; row < height; row++) { |
| const GLvoid *source = _mesa_image_address2d(unpack, pixels, |
| width, height, |
| GL_STENCIL_INDEX, type, |
| row, 0); |
| _mesa_unpack_stencil_span(ctx, width, destType, values, |
| type, source, unpack, |
| ctx->_ImageTransferState); |
| if (zoom) { |
| _swrast_write_zoomed_stencil_span(ctx, x, y, width, |
| x, y, values); |
| } |
| else { |
| _swrast_write_stencil_span(ctx, width, x, y, values); |
| } |
| |
| y++; |
| } |
| |
| free(values); |
| } |
| |
| |
| /* |
| * Draw depth image. |
| */ |
| static void |
| draw_depth_pixels( struct gl_context *ctx, GLint x, GLint y, |
| GLsizei width, GLsizei height, |
| GLenum type, |
| const struct gl_pixelstore_attrib *unpack, |
| const GLvoid *pixels ) |
| { |
| const GLboolean scaleOrBias |
| = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0; |
| const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0; |
| SWspan span; |
| |
| INIT_SPAN(span, GL_BITMAP); |
| span.arrayMask = SPAN_Z; |
| _swrast_span_default_attribs(ctx, &span); |
| |
| if (type == GL_UNSIGNED_SHORT |
| && ctx->DrawBuffer->Visual.depthBits == 16 |
| && !scaleOrBias |
| && !zoom |
| && width <= SWRAST_MAX_WIDTH |
| && !unpack->SwapBytes) { |
| /* Special case: directly write 16-bit depth values */ |
| GLint row; |
| for (row = 0; row < height; row++) { |
| const GLushort *zSrc = (const GLushort *) |
| _mesa_image_address2d(unpack, pixels, width, height, |
| GL_DEPTH_COMPONENT, type, row, 0); |
| GLint i; |
| for (i = 0; i < width; i++) |
| span.array->z[i] = zSrc[i]; |
| span.x = x; |
| span.y = y + row; |
| span.end = width; |
| _swrast_write_rgba_span(ctx, &span); |
| } |
| } |
| else if (type == GL_UNSIGNED_INT |
| && !scaleOrBias |
| && !zoom |
| && width <= SWRAST_MAX_WIDTH |
| && !unpack->SwapBytes) { |
| /* Special case: shift 32-bit values down to Visual.depthBits */ |
| const GLint shift = 32 - ctx->DrawBuffer->Visual.depthBits; |
| GLint row; |
| for (row = 0; row < height; row++) { |
| const GLuint *zSrc = (const GLuint *) |
| _mesa_image_address2d(unpack, pixels, width, height, |
| GL_DEPTH_COMPONENT, type, row, 0); |
| if (shift == 0) { |
| memcpy(span.array->z, zSrc, width * sizeof(GLuint)); |
| } |
| else { |
| GLint col; |
| for (col = 0; col < width; col++) |
| span.array->z[col] = zSrc[col] >> shift; |
| } |
| span.x = x; |
| span.y = y + row; |
| span.end = width; |
| _swrast_write_rgba_span(ctx, &span); |
| } |
| } |
| else { |
| /* General case */ |
| const GLuint depthMax = ctx->DrawBuffer->_DepthMax; |
| GLint skipPixels = 0; |
| |
| /* in case width > SWRAST_MAX_WIDTH do the copy in chunks */ |
| while (skipPixels < width) { |
| const GLint spanWidth = MIN2(width - skipPixels, SWRAST_MAX_WIDTH); |
| GLint row; |
| ASSERT(span.end <= SWRAST_MAX_WIDTH); |
| for (row = 0; row < height; row++) { |
| const GLvoid *zSrc = _mesa_image_address2d(unpack, |
| pixels, width, height, |
| GL_DEPTH_COMPONENT, type, |
| row, skipPixels); |
| |
| /* Set these for each row since the _swrast_write_* function may |
| * change them while clipping. |
| */ |
| span.x = x + skipPixels; |
| span.y = y + row; |
| span.end = spanWidth; |
| |
| _mesa_unpack_depth_span(ctx, spanWidth, |
| GL_UNSIGNED_INT, span.array->z, depthMax, |
| type, zSrc, unpack); |
| if (zoom) { |
| _swrast_write_zoomed_depth_span(ctx, x, y, &span); |
| } |
| else { |
| _swrast_write_rgba_span(ctx, &span); |
| } |
| } |
| skipPixels += spanWidth; |
| } |
| } |
| } |
| |
| |
| |
| /** |
| * Draw RGBA image. |
| */ |
| static void |
| draw_rgba_pixels( struct gl_context *ctx, GLint x, GLint y, |
| GLsizei width, GLsizei height, |
| GLenum format, GLenum type, |
| const struct gl_pixelstore_attrib *unpack, |
| const GLvoid *pixels ) |
| { |
| const GLint imgX = x, imgY = y; |
| const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0; |
| GLfloat *convImage = NULL; |
| GLbitfield transferOps = ctx->_ImageTransferState; |
| SWspan span; |
| |
| /* Try an optimized glDrawPixels first */ |
| if (fast_draw_rgba_pixels(ctx, x, y, width, height, format, type, |
| unpack, pixels)) { |
| return; |
| } |
| |
| swrast_render_start(ctx); |
| |
| INIT_SPAN(span, GL_BITMAP); |
| _swrast_span_default_attribs(ctx, &span); |
| span.arrayMask = SPAN_RGBA; |
| span.arrayAttribs = FRAG_BIT_COL0; /* we're fill in COL0 attrib values */ |
| |
| if (ctx->DrawBuffer->_NumColorDrawBuffers > 0) { |
| GLenum datatype = _mesa_get_format_datatype( |
| ctx->DrawBuffer->_ColorDrawBuffers[0]->Format); |
| if (datatype != GL_FLOAT && |
| ctx->Color.ClampFragmentColor != GL_FALSE) { |
| /* need to clamp colors before applying fragment ops */ |
| transferOps |= IMAGE_CLAMP_BIT; |
| } |
| } |
| |
| /* |
| * General solution |
| */ |
| { |
| const GLbitfield interpMask = span.interpMask; |
| const GLbitfield arrayMask = span.arrayMask; |
| const GLint srcStride |
| = _mesa_image_row_stride(unpack, width, format, type); |
| GLint skipPixels = 0; |
| /* use span array for temp color storage */ |
| GLfloat *rgba = (GLfloat *) span.array->attribs[FRAG_ATTRIB_COL0]; |
| |
| /* if the span is wider than SWRAST_MAX_WIDTH we have to do it in chunks */ |
| while (skipPixels < width) { |
| const GLint spanWidth = MIN2(width - skipPixels, SWRAST_MAX_WIDTH); |
| const GLubyte *source |
| = (const GLubyte *) _mesa_image_address2d(unpack, pixels, |
| width, height, format, |
| type, 0, skipPixels); |
| GLint row; |
| |
| for (row = 0; row < height; row++) { |
| /* get image row as float/RGBA */ |
| _mesa_unpack_color_span_float(ctx, spanWidth, GL_RGBA, rgba, |
| format, type, source, unpack, |
| transferOps); |
| /* Set these for each row since the _swrast_write_* functions |
| * may change them while clipping/rendering. |
| */ |
| span.array->ChanType = GL_FLOAT; |
| span.x = x + skipPixels; |
| span.y = y + row; |
| span.end = spanWidth; |
| span.arrayMask = arrayMask; |
| span.interpMask = interpMask; |
| if (zoom) { |
| _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span, rgba); |
| } |
| else { |
| _swrast_write_rgba_span(ctx, &span); |
| } |
| |
| source += srcStride; |
| } /* for row */ |
| |
| skipPixels += spanWidth; |
| } /* while skipPixels < width */ |
| |
| /* XXX this is ugly/temporary, to undo above change */ |
| span.array->ChanType = CHAN_TYPE; |
| } |
| |
| if (convImage) { |
| free(convImage); |
| } |
| |
| swrast_render_finish(ctx); |
| } |
| |
| |
| /** |
| * Draw depth+stencil values into a MESA_FORAMT_Z24_S8 or MESA_FORMAT_S8_Z24 |
| * renderbuffer. No masking, zooming, scaling, etc. |
| */ |
| static void |
| fast_draw_depth_stencil(struct gl_context *ctx, GLint x, GLint y, |
| GLsizei width, GLsizei height, |
| const struct gl_pixelstore_attrib *unpack, |
| const GLvoid *pixels) |
| { |
| const GLenum format = GL_DEPTH_STENCIL_EXT; |
| const GLenum type = GL_UNSIGNED_INT_24_8; |
| struct gl_renderbuffer *rb = |
| ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer; |
| struct swrast_renderbuffer *srb = swrast_renderbuffer(rb); |
| GLubyte *src, *dst; |
| GLint srcRowStride, dstRowStride; |
| GLint i; |
| |
| src = _mesa_image_address2d(unpack, pixels, width, height, |
| format, type, 0, 0); |
| srcRowStride = _mesa_image_row_stride(unpack, width, format, type); |
| |
| dst = _swrast_pixel_address(rb, x, y); |
| dstRowStride = srb->RowStride; |
| |
| for (i = 0; i < height; i++) { |
| _mesa_pack_uint_24_8_depth_stencil_row(rb->Format, width, |
| (const GLuint *) src, dst); |
| dst += dstRowStride; |
| src += srcRowStride; |
| } |
| } |
| |
| |
| |
| /** |
| * This is a bit different from drawing GL_DEPTH_COMPONENT pixels. |
| * The only per-pixel operations that apply are depth scale/bias, |
| * stencil offset/shift, GL_DEPTH_WRITEMASK and GL_STENCIL_WRITEMASK, |
| * and pixel zoom. |
| * Also, only the depth buffer and stencil buffers are touched, not the |
| * color buffer(s). |
| */ |
| static void |
| draw_depth_stencil_pixels(struct gl_context *ctx, GLint x, GLint y, |
| GLsizei width, GLsizei height, GLenum type, |
| const struct gl_pixelstore_attrib *unpack, |
| const GLvoid *pixels) |
| { |
| const GLint imgX = x, imgY = y; |
| const GLboolean scaleOrBias |
| = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0; |
| const GLuint stencilMask = ctx->Stencil.WriteMask[0]; |
| const GLenum stencilType = GL_UNSIGNED_BYTE; |
| const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0; |
| struct gl_renderbuffer *depthRb, *stencilRb; |
| struct gl_pixelstore_attrib clippedUnpack = *unpack; |
| |
| if (!zoom) { |
| if (!_mesa_clip_drawpixels(ctx, &x, &y, &width, &height, |
| &clippedUnpack)) { |
| /* totally clipped */ |
| return; |
| } |
| } |
| |
| depthRb = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer; |
| stencilRb = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer; |
| ASSERT(depthRb); |
| ASSERT(stencilRb); |
| |
| if (depthRb == stencilRb && |
| (depthRb->Format == MESA_FORMAT_Z24_S8 || |
| depthRb->Format == MESA_FORMAT_S8_Z24) && |
| type == GL_UNSIGNED_INT_24_8 && |
| !scaleOrBias && |
| !zoom && |
| ctx->Depth.Mask && |
| (stencilMask & 0xff) == 0xff) { |
| fast_draw_depth_stencil(ctx, x, y, width, height, |
| &clippedUnpack, pixels); |
| } |
| else { |
| /* sub-optimal cases: |
| * Separate depth/stencil buffers, or pixel transfer ops required. |
| */ |
| /* XXX need to handle very wide images (skippixels) */ |
| GLuint *zValues; /* 32-bit Z values */ |
| GLint i; |
| |
| zValues = (GLuint *) malloc(width * sizeof(GLuint)); |
| if (!zValues) { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels"); |
| return; |
| } |
| |
| for (i = 0; i < height; i++) { |
| const GLuint *depthStencilSrc = (const GLuint *) |
| _mesa_image_address2d(&clippedUnpack, pixels, width, height, |
| GL_DEPTH_STENCIL_EXT, type, i, 0); |
| |
| if (ctx->Depth.Mask) { |
| _mesa_unpack_depth_span(ctx, width, |
| GL_UNSIGNED_INT, /* dest type */ |
| zValues, /* dest addr */ |
| 0xffffffff, /* depth max */ |
| type, /* src type */ |
| depthStencilSrc, /* src addr */ |
| &clippedUnpack); |
| if (zoom) { |
| _swrast_write_zoomed_z_span(ctx, imgX, imgY, width, x, |
| y + i, zValues); |
| } |
| else { |
| GLubyte *dst = _swrast_pixel_address(depthRb, x, y + i); |
| _mesa_pack_uint_z_row(depthRb->Format, width, zValues, dst); |
| } |
| } |
| |
| if (stencilMask != 0x0) { |
| GLubyte *stencilValues = (GLubyte *) zValues; /* re-use buffer */ |
| /* get stencil values, with shift/offset/mapping */ |
| _mesa_unpack_stencil_span(ctx, width, stencilType, stencilValues, |
| type, depthStencilSrc, &clippedUnpack, |
| ctx->_ImageTransferState); |
| if (zoom) |
| _swrast_write_zoomed_stencil_span(ctx, imgX, imgY, width, |
| x, y + i, stencilValues); |
| else |
| _swrast_write_stencil_span(ctx, width, x, y + i, stencilValues); |
| } |
| } |
| |
| free(zValues); |
| } |
| } |
| |
| |
| /** |
| * Execute software-based glDrawPixels. |
| * By time we get here, all error checking will have been done. |
| */ |
| void |
| _swrast_DrawPixels( struct gl_context *ctx, |
| GLint x, GLint y, |
| GLsizei width, GLsizei height, |
| GLenum format, GLenum type, |
| const struct gl_pixelstore_attrib *unpack, |
| const GLvoid *pixels ) |
| { |
| SWcontext *swrast = SWRAST_CONTEXT(ctx); |
| GLboolean save_vp_override = ctx->VertexProgram._Overriden; |
| |
| if (!_mesa_check_conditional_render(ctx)) |
| return; /* don't draw */ |
| |
| /* We are creating fragments directly, without going through vertex |
| * programs. |
| * |
| * This override flag tells the fragment processing code that its input |
| * comes from a non-standard source, and it may therefore not rely on |
| * optimizations that assume e.g. constant color if there is no color |
| * vertex array. |
| */ |
| _mesa_set_vp_override(ctx, GL_TRUE); |
| |
| if (ctx->NewState) |
| _mesa_update_state(ctx); |
| |
| if (swrast->NewState) |
| _swrast_validate_derived( ctx ); |
| |
| pixels = _mesa_map_pbo_source(ctx, unpack, pixels); |
| if (!pixels) { |
| _mesa_set_vp_override(ctx, save_vp_override); |
| return; |
| } |
| |
| /* |
| * By time we get here, all error checking should have been done. |
| */ |
| switch (format) { |
| case GL_STENCIL_INDEX: |
| swrast_render_start(ctx); |
| draw_stencil_pixels( ctx, x, y, width, height, type, unpack, pixels ); |
| swrast_render_finish(ctx); |
| break; |
| case GL_DEPTH_COMPONENT: |
| swrast_render_start(ctx); |
| draw_depth_pixels( ctx, x, y, width, height, type, unpack, pixels ); |
| swrast_render_finish(ctx); |
| break; |
| case GL_DEPTH_STENCIL_EXT: |
| swrast_render_start(ctx); |
| draw_depth_stencil_pixels(ctx, x, y, width, height, type, unpack, pixels); |
| swrast_render_finish(ctx); |
| break; |
| default: |
| /* all other formats should be color formats */ |
| draw_rgba_pixels(ctx, x, y, width, height, format, type, unpack, pixels); |
| } |
| |
| _mesa_set_vp_override(ctx, save_vp_override); |
| |
| _mesa_unmap_pbo_source(ctx, unpack); |
| } |
