/* * Mesa 3-D graphics library * * 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 * THE AUTHORS OR COPYRIGHT HOLDERS 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/format_utils.h" #include "main/glformats.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_B8G8R8X8_UNORM || rb->Format == MESA_FORMAT_B8G8R8A8_UNORM)) { 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_B8G8R8X8_UNORM || rb->Format == MESA_FORMAT_B8G8R8A8_UNORM)) { 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, NULL)) { 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 != 1.0F || ctx->Pixel.ZoomY != 1.0F; const GLenum destType = GL_UNSIGNED_BYTE; GLint row; GLubyte *values; values = 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 != 1.0f || ctx->Pixel.DepthBias != 0.0f; const GLboolean zoom = ctx->Pixel.ZoomX != 1.0f || ctx->Pixel.ZoomY != 1.0f; 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 != 1.0F || ctx->Pixel.ZoomY != 1.0F; 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 = VARYING_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; GLint skipPixels = 0; /* use span array for temp color storage */ GLfloat *rgba = (GLfloat *) span.array->attribs[VARYING_SLOT_COL0]; void *tempImage = NULL; /* We have to deal with GL_COLOR_INDEX manually because * _mesa_format_convert does not handle this format. So what we do here is * convert it to RGBA ubyte first and then convert from that to dst as * usual. */ if (format == GL_COLOR_INDEX) { /* This will handle byte swapping and transferops if needed */ tempImage = _mesa_unpack_color_index_to_rgba_ubyte(ctx, 2, pixels, format, type, width, height, 1, unpack, transferOps); if (!tempImage) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels"); return; } transferOps = 0; pixels = tempImage; format = GL_RGBA; type = GL_UNSIGNED_BYTE; } else if (unpack->SwapBytes) { /* We have to handle byte-swapping scenarios before calling * _mesa_format_convert */ GLint swapSize = _mesa_sizeof_packed_type(type); if (swapSize == 2 || swapSize == 4) { int components = _mesa_components_in_format(format); int elementCount = width * height * components; tempImage = malloc(elementCount * swapSize); if (!tempImage) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels"); return; } if (swapSize == 2) _mesa_swap2_copy(tempImage, (GLushort *) pixels, elementCount); else _mesa_swap4_copy(tempImage, (GLuint *) pixels, elementCount); pixels = tempImage; } } const GLint srcStride = _mesa_image_row_stride(unpack, width, format, type); /* 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; /* get image row as float/RGBA */ uint32_t srcMesaFormat = _mesa_format_from_format_and_type(format, type); for (row = 0; row < height; row++) { int dstRowStride = 4 * width * sizeof(float); _mesa_format_convert(rgba, RGBA32_FLOAT, dstRowStride, (void*)source, srcMesaFormat, srcStride, spanWidth, 1, NULL); if (transferOps) _mesa_apply_rgba_transfer_ops(ctx, transferOps, spanWidth, (GLfloat (*)[4])rgba); /* 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; free(tempImage); } swrast_render_finish(ctx); } /** * Draw depth+stencil values into a MESA_FORAMT_Z24_S8 or MESA_FORMAT_Z24_UNORM_S8_UINT * 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 != 1.0F || ctx->Pixel.DepthBias != 0.0F; const GLuint stencilMask = ctx->Stencil.WriteMask[0]; const GLenum stencilType = GL_UNSIGNED_BYTE; const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F; 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_S8_UINT_Z24_UNORM || depthRb->Format == MESA_FORMAT_Z24_UNORM_S8_UINT) && 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 = 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); }