diff options
Diffstat (limited to 'src/mesa/drivers')
-rw-r--r-- | src/mesa/drivers/glide/fxdd.c | 123 |
1 files changed, 121 insertions, 2 deletions
diff --git a/src/mesa/drivers/glide/fxdd.c b/src/mesa/drivers/glide/fxdd.c index 35dbf5a1579..bd571d415c3 100644 --- a/src/mesa/drivers/glide/fxdd.c +++ b/src/mesa/drivers/glide/fxdd.c @@ -346,7 +346,7 @@ static GLboolean inClipRects(fxMesaContext fxMesa, int px, int py) #endif -static GLboolean fxDDDrawBitMap(GLcontext *ctx, GLint px, GLint py, +static GLboolean fxDDDrawBitmap(GLcontext *ctx, GLint px, GLint py, GLsizei width, GLsizei height, const struct gl_pixelstore_attrib *unpack, const GLubyte *bitmap) @@ -519,6 +519,124 @@ static GLboolean fxDDDrawBitMap(GLcontext *ctx, GLint px, GLint py, return GL_TRUE; } + +static GLboolean fxDDReadPixels( GLcontext *ctx, GLint x, GLint y, + GLsizei width, GLsizei height, + GLenum format, GLenum type, + const struct gl_pixelstore_attrib *packing, + GLvoid *dstImage ) +{ + if (ctx->Pixel.ScaleOrBiasRGBA || ctx->Pixel.MapColorFlag) { + return GL_FALSE; /* can't do this */ + } + else { + fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx; + GrLfbInfo_t info; + GLboolean result; + + BEGIN_BOARD_LOCK(); + if (grLfbLock(GR_LFB_READ_ONLY, + fxMesa->currentFB, + GR_LFBWRITEMODE_ANY, + GR_ORIGIN_UPPER_LEFT, + FXFALSE, + &info)) { + const GLint winX = fxMesa->x_offset; + const GLint winY = fxMesa->y_offset + fxMesa->height - 1; + const GLint srcStride = (fxMesa->glCtx->Color.DrawBuffer == GL_FRONT) + ? (fxMesa->screen_width) : (info.strideInBytes / 2); + const GLushort *src = (const GLushort *) info.lfbPtr + + (winY - y) * srcStride + (winX + x); + GLubyte *dst = (GLubyte *) _mesa_image_address(packing, dstImage, + width, height, format, type, 0, 0, 0); + GLint dstStride = _mesa_image_row_stride(packing, width, format, type); + + if (format == GL_RGB && type == GL_UNSIGNED_BYTE) { + /* convert 5R6G5B into 8R8G8B */ + GLint row, col; + const GLint halfWidth = width >> 1; + const GLint extraPixel = (width & 1); + for (row = 0; row < height; row++) { + GLubyte *d = dst; + for (col = 0; col < halfWidth; col++) { + const GLuint pixel = ((const GLuint *) src)[col]; + const GLint pixel0 = pixel & 0xffff; + const GLint pixel1 = pixel >> 16; + *d++ = FX_PixelToR[pixel0]; + *d++ = FX_PixelToG[pixel0]; + *d++ = FX_PixelToB[pixel0]; + *d++ = FX_PixelToR[pixel1]; + *d++ = FX_PixelToG[pixel1]; + *d++ = FX_PixelToB[pixel1]; + } + if (extraPixel) { + GLushort pixel = src[width-1]; + *d++ = FX_PixelToR[pixel]; + *d++ = FX_PixelToG[pixel]; + *d++ = FX_PixelToB[pixel]; + } + dst += dstStride; + src -= srcStride; + } + result = GL_TRUE; + } + else if (format == GL_RGBA && type == GL_UNSIGNED_BYTE) { + /* convert 5R6G5B into 8R8G8B8A */ + GLint row, col; + const GLint halfWidth = width >> 1; + const GLint extraPixel = (width & 1); + for (row = 0; row < height; row++) { + GLubyte *d = dst; + for (col = 0; col < halfWidth; col++) { + const GLuint pixel = ((const GLuint *) src)[col]; + const GLint pixel0 = pixel & 0xffff; + const GLint pixel1 = pixel >> 16; + *d++ = FX_PixelToR[pixel0]; + *d++ = FX_PixelToG[pixel0]; + *d++ = FX_PixelToB[pixel0]; + *d++ = 255; + *d++ = FX_PixelToR[pixel1]; + *d++ = FX_PixelToG[pixel1]; + *d++ = FX_PixelToB[pixel1]; + *d++ = 255; + } + if (extraPixel) { + const GLushort pixel = src[width-1]; + *d++ = FX_PixelToR[pixel]; + *d++ = FX_PixelToG[pixel]; + *d++ = FX_PixelToB[pixel]; + *d++ = 255; + } + dst += dstStride; + src -= srcStride; + } + result = GL_TRUE; + } + else if (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) { + /* directly memcpy 5R6G5B pixels into client's buffer */ + const GLint widthInBytes = width * 2; + GLint row; + for (row = 0; row < height; row++) { + MEMCPY(dst, src, widthInBytes); + dst += dstStride; + src -= srcStride; + } + result = GL_TRUE; + } + else { + result = GL_FALSE; + } + + grLfbUnlock(GR_LFB_READ_ONLY, fxMesa->currentFB); + } + END_BOARD_LOCK(); + + return result; + } +} + + + static void fxDDFinish(GLcontext *ctx) { FX_grFlush(); @@ -981,8 +1099,9 @@ void fxSetupDDPointers(GLcontext *ctx) ctx->Driver.SetReadBuffer=fxDDSetReadBuffer; ctx->Driver.GetBufferSize=fxDDBufferSize; - ctx->Driver.Bitmap=fxDDDrawBitMap; + ctx->Driver.Bitmap=fxDDDrawBitmap; ctx->Driver.DrawPixels=NULL; + ctx->Driver.ReadPixels=fxDDReadPixels; ctx->Driver.Finish=fxDDFinish; ctx->Driver.Flush=NULL; |