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520 lines
17 KiB
C
520 lines
17 KiB
C
/*
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* Mesa 3-D graphics library
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* Version: 7.1
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*
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* Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <precomp.h>
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#include <main/pack.h>
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/**
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* Handle a common case of drawing GL_RGB/GL_UNSIGNED_BYTE into a
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* MESA_FORMAT_XRGB888 or MESA_FORMAT_ARGB888 renderbuffer.
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*/
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static void
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fast_draw_rgb_ubyte_pixels(struct gl_context *ctx,
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struct gl_renderbuffer *rb,
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GLint x, GLint y,
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GLsizei width, GLsizei height,
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const struct gl_pixelstore_attrib *unpack,
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const GLvoid *pixels)
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{
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const GLubyte *src = (const GLubyte *)
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_mesa_image_address2d(unpack, pixels, width,
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height, GL_RGB, GL_UNSIGNED_BYTE, 0, 0);
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const GLint srcRowStride = _mesa_image_row_stride(unpack, width,
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GL_RGB, GL_UNSIGNED_BYTE);
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GLint i, j;
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GLubyte *dst;
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GLint dstRowStride;
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ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height,
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GL_MAP_WRITE_BIT, &dst, &dstRowStride);
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if (!dst) {
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_mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
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return;
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}
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if (ctx->Pixel.ZoomY == -1.0f) {
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dst = dst + (height - 1) * dstRowStride;
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dstRowStride = -dstRowStride;
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}
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for (i = 0; i < height; i++) {
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GLuint *dst4 = (GLuint *) dst;
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for (j = 0; j < width; j++) {
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dst4[j] = PACK_COLOR_8888(0xff, src[j*3+0], src[j*3+1], src[j*3+2]);
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}
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dst += dstRowStride;
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src += srcRowStride;
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}
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ctx->Driver.UnmapRenderbuffer(ctx, rb);
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}
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/**
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* Handle a common case of drawing GL_RGBA/GL_UNSIGNED_BYTE into a
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* MESA_FORMAT_ARGB888 or MESA_FORMAT_xRGB888 renderbuffer.
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*/
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static void
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fast_draw_rgba_ubyte_pixels(struct gl_context *ctx,
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struct gl_renderbuffer *rb,
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GLint x, GLint y,
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GLsizei width, GLsizei height,
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const struct gl_pixelstore_attrib *unpack,
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const GLvoid *pixels)
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{
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const GLubyte *src = (const GLubyte *)
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_mesa_image_address2d(unpack, pixels, width,
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height, GL_RGBA, GL_UNSIGNED_BYTE, 0, 0);
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const GLint srcRowStride =
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_mesa_image_row_stride(unpack, width, GL_RGBA, GL_UNSIGNED_BYTE);
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GLint i, j;
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GLubyte *dst;
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GLint dstRowStride;
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ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height,
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GL_MAP_WRITE_BIT, &dst, &dstRowStride);
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if (!dst) {
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_mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
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return;
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}
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if (ctx->Pixel.ZoomY == -1.0f) {
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dst = dst + (height - 1) * dstRowStride;
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dstRowStride = -dstRowStride;
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}
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for (i = 0; i < height; i++) {
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GLuint *dst4 = (GLuint *) dst;
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for (j = 0; j < width; j++) {
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dst4[j] = PACK_COLOR_8888(src[j*4+3], src[j*4+0],
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src[j*4+1], src[j*4+2]);
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}
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dst += dstRowStride;
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src += srcRowStride;
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}
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ctx->Driver.UnmapRenderbuffer(ctx, rb);
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}
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/**
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* Handle a common case of drawing a format/type combination that
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* exactly matches the renderbuffer format.
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*/
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static void
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fast_draw_generic_pixels(struct gl_context *ctx,
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struct gl_renderbuffer *rb,
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GLint x, GLint y,
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GLsizei width, GLsizei height,
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GLenum format, GLenum type,
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const struct gl_pixelstore_attrib *unpack,
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const GLvoid *pixels)
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{
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const GLubyte *src = (const GLubyte *)
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_mesa_image_address2d(unpack, pixels, width,
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height, format, type, 0, 0);
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const GLint srcRowStride =
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_mesa_image_row_stride(unpack, width, format, type);
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const GLint rowLength = width * _mesa_get_format_bytes(rb->Format);
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GLint i;
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GLubyte *dst;
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GLint dstRowStride;
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ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height,
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GL_MAP_WRITE_BIT, &dst, &dstRowStride);
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if (!dst) {
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_mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
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return;
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}
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if (ctx->Pixel.ZoomY == -1.0f) {
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dst = dst + (height - 1) * dstRowStride;
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dstRowStride = -dstRowStride;
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}
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for (i = 0; i < height; i++) {
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memcpy(dst, src, rowLength);
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dst += dstRowStride;
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src += srcRowStride;
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}
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ctx->Driver.UnmapRenderbuffer(ctx, rb);
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}
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/**
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* Try to do a fast and simple RGB(a) glDrawPixels.
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* Return: GL_TRUE if success, GL_FALSE if slow path must be used instead
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*/
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static GLboolean
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fast_draw_rgba_pixels(struct gl_context *ctx, GLint x, GLint y,
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GLsizei width, GLsizei height,
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GLenum format, GLenum type,
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const struct gl_pixelstore_attrib *userUnpack,
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const GLvoid *pixels)
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{
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struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffer;
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SWcontext *swrast = SWRAST_CONTEXT(ctx);
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struct gl_pixelstore_attrib unpack;
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if (!rb)
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return GL_TRUE; /* no-op */
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if ((swrast->_RasterMask & ~CLIP_BIT) ||
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ctx->Texture._EnabledCoord ||
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userUnpack->SwapBytes ||
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ctx->Pixel.ZoomX != 1.0f ||
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fabsf(ctx->Pixel.ZoomY) != 1.0f ||
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ctx->_ImageTransferState) {
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/* can't handle any of those conditions */
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return GL_FALSE;
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}
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unpack = *userUnpack;
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/* clipping */
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if (!_mesa_clip_drawpixels(ctx, &x, &y, &width, &height, &unpack)) {
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/* image was completely clipped: no-op, all done */
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return GL_TRUE;
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}
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if (format == GL_RGB &&
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type == GL_UNSIGNED_BYTE &&
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(rb->Format == MESA_FORMAT_XRGB8888 ||
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rb->Format == MESA_FORMAT_ARGB8888)) {
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fast_draw_rgb_ubyte_pixels(ctx, rb, x, y, width, height,
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&unpack, pixels);
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return GL_TRUE;
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}
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if (format == GL_RGBA &&
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type == GL_UNSIGNED_BYTE &&
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(rb->Format == MESA_FORMAT_XRGB8888 ||
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rb->Format == MESA_FORMAT_ARGB8888)) {
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fast_draw_rgba_ubyte_pixels(ctx, rb, x, y, width, height,
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&unpack, pixels);
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return GL_TRUE;
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}
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if (_mesa_format_matches_format_and_type(rb->Format, format, type)) {
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fast_draw_generic_pixels(ctx, rb, x, y, width, height,
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format, type, &unpack, pixels);
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return GL_TRUE;
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}
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/* can't handle this pixel format and/or data type */
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return GL_FALSE;
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}
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/*
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* Draw stencil image.
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*/
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static void
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draw_stencil_pixels( struct gl_context *ctx, GLint x, GLint y,
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GLsizei width, GLsizei height,
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GLenum type,
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const struct gl_pixelstore_attrib *unpack,
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const GLvoid *pixels )
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{
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const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
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const GLenum destType = GL_UNSIGNED_BYTE;
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GLint skipPixels;
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/* if width > MAX_WIDTH, have to process image in chunks */
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skipPixels = 0;
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while (skipPixels < width) {
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const GLint spanX = x + skipPixels;
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const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
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GLint row;
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for (row = 0; row < height; row++) {
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const GLint spanY = y + row;
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GLubyte values[MAX_WIDTH];
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const GLvoid *source = _mesa_image_address2d(unpack, pixels,
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width, height,
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GL_STENCIL_INDEX, type,
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row, skipPixels);
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_mesa_unpack_stencil_span(ctx, spanWidth, destType, values,
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type, source, unpack,
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ctx->_ImageTransferState);
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if (zoom) {
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_swrast_write_zoomed_stencil_span(ctx, x, y, spanWidth,
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spanX, spanY, values);
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}
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else {
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_swrast_write_stencil_span(ctx, spanWidth, spanX, spanY, values);
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}
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}
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skipPixels += spanWidth;
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}
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}
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/*
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* Draw depth image.
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*/
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static void
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draw_depth_pixels( struct gl_context *ctx, GLint x, GLint y,
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GLsizei width, GLsizei height,
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GLenum type,
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const struct gl_pixelstore_attrib *unpack,
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const GLvoid *pixels )
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{
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const GLboolean scaleOrBias
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= ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
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const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
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SWspan span;
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INIT_SPAN(span, GL_BITMAP);
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span.arrayMask = SPAN_Z;
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_swrast_span_default_attribs(ctx, &span);
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if (type == GL_UNSIGNED_SHORT
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&& ctx->DrawBuffer->Visual.depthBits == 16
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&& !scaleOrBias
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&& !zoom
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&& width <= MAX_WIDTH
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&& !unpack->SwapBytes) {
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/* Special case: directly write 16-bit depth values */
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GLint row;
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for (row = 0; row < height; row++) {
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const GLushort *zSrc = (const GLushort *)
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_mesa_image_address2d(unpack, pixels, width, height,
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GL_DEPTH_COMPONENT, type, row, 0);
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GLint i;
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for (i = 0; i < width; i++)
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span.array->z[i] = zSrc[i];
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span.x = x;
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span.y = y + row;
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span.end = width;
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_swrast_write_rgba_span(ctx, &span);
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}
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}
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else if (type == GL_UNSIGNED_INT
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&& !scaleOrBias
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&& !zoom
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&& width <= MAX_WIDTH
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&& !unpack->SwapBytes) {
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/* Special case: shift 32-bit values down to Visual.depthBits */
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const GLint shift = 32 - ctx->DrawBuffer->Visual.depthBits;
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GLint row;
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for (row = 0; row < height; row++) {
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const GLuint *zSrc = (const GLuint *)
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_mesa_image_address2d(unpack, pixels, width, height,
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GL_DEPTH_COMPONENT, type, row, 0);
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if (shift == 0) {
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memcpy(span.array->z, zSrc, width * sizeof(GLuint));
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}
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else {
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GLint col;
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for (col = 0; col < width; col++)
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span.array->z[col] = zSrc[col] >> shift;
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}
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span.x = x;
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span.y = y + row;
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span.end = width;
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_swrast_write_rgba_span(ctx, &span);
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}
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}
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else {
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/* General case */
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const GLuint depthMax = ctx->DrawBuffer->_DepthMax;
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GLint skipPixels = 0;
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/* in case width > MAX_WIDTH do the copy in chunks */
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while (skipPixels < width) {
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const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
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GLint row;
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ASSERT(span.end <= MAX_WIDTH);
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for (row = 0; row < height; row++) {
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const GLvoid *zSrc = _mesa_image_address2d(unpack,
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pixels, width, height,
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GL_DEPTH_COMPONENT, type,
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row, skipPixels);
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/* Set these for each row since the _swrast_write_* function may
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* change them while clipping.
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*/
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span.x = x + skipPixels;
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span.y = y + row;
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span.end = spanWidth;
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_mesa_unpack_depth_span(ctx, spanWidth,
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GL_UNSIGNED_INT, span.array->z, depthMax,
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type, zSrc, unpack);
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if (zoom) {
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_swrast_write_zoomed_depth_span(ctx, x, y, &span);
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}
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else {
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_swrast_write_rgba_span(ctx, &span);
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}
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}
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skipPixels += spanWidth;
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}
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}
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}
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/**
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* Draw RGBA image.
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*/
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static void
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draw_rgba_pixels( struct gl_context *ctx, GLint x, GLint y,
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GLsizei width, GLsizei height,
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GLenum format, GLenum type,
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const struct gl_pixelstore_attrib *unpack,
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const GLvoid *pixels )
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{
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const GLint imgX = x, imgY = y;
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const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
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GLfloat *convImage = NULL;
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GLbitfield transferOps = ctx->_ImageTransferState;
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SWspan span;
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/* Try an optimized glDrawPixels first */
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if (fast_draw_rgba_pixels(ctx, x, y, width, height, format, type,
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unpack, pixels)) {
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return;
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}
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swrast_render_start(ctx);
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INIT_SPAN(span, GL_BITMAP);
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_swrast_span_default_attribs(ctx, &span);
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span.arrayMask = SPAN_RGBA;
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span.arrayAttribs = FRAG_BIT_COL; /* we're fill in COL0 attrib values */
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if (_mesa_get_format_datatype(ctx->DrawBuffer->_ColorDrawBuffer->Format) != GL_FLOAT) {
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/* need to clamp colors before applying fragment ops */
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transferOps |= IMAGE_CLAMP_BIT;
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}
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/*
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* General solution
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*/
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{
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const GLbitfield interpMask = span.interpMask;
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const GLbitfield arrayMask = span.arrayMask;
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const GLint srcStride
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= _mesa_image_row_stride(unpack, width, format, type);
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GLint skipPixels = 0;
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/* use span array for temp color storage */
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GLfloat *rgba = (GLfloat *) span.array->attribs[FRAG_ATTRIB_COL];
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/* if the span is wider than MAX_WIDTH we have to do it in chunks */
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while (skipPixels < width) {
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const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
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const GLubyte *source
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= (const GLubyte *) _mesa_image_address2d(unpack, pixels,
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width, height, format,
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type, 0, skipPixels);
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GLint row;
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for (row = 0; row < height; row++) {
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/* get image row as float/RGBA */
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_mesa_unpack_color_span_float(ctx, spanWidth, GL_RGBA, rgba,
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format, type, source, unpack,
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transferOps);
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/* Set these for each row since the _swrast_write_* functions
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* may change them while clipping/rendering.
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*/
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span.array->ChanType = GL_FLOAT;
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span.x = x + skipPixels;
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span.y = y + row;
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span.end = spanWidth;
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span.arrayMask = arrayMask;
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span.interpMask = interpMask;
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if (zoom) {
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_swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span, rgba);
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}
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else {
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_swrast_write_rgba_span(ctx, &span);
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}
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source += srcStride;
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} /* for row */
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skipPixels += spanWidth;
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} /* while skipPixels < width */
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/* XXX this is ugly/temporary, to undo above change */
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span.array->ChanType = CHAN_TYPE;
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}
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if (convImage) {
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free(convImage);
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}
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swrast_render_finish(ctx);
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}
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/**
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* Execute software-based glDrawPixels.
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* By time we get here, all error checking will have been done.
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*/
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void
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_swrast_DrawPixels( struct gl_context *ctx,
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GLint x, GLint y,
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GLsizei width, GLsizei height,
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GLenum format, GLenum type,
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const struct gl_pixelstore_attrib *unpack,
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const GLvoid *pixels )
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{
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SWcontext *swrast = SWRAST_CONTEXT(ctx);
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if (ctx->NewState)
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_mesa_update_state(ctx);
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if (swrast->NewState)
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_swrast_validate_derived( ctx );
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if (!pixels) {
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return;
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}
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/*
|
|
* 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;
|
|
default:
|
|
/* all other formats should be color formats */
|
|
draw_rgba_pixels(ctx, x, y, width, height, format, type, unpack, pixels);
|
|
}
|
|
}
|