From 6dc85575000127630489b407c50a4b3ea87c9acb Mon Sep 17 00:00:00 2001 From: Keith Whitwell Date: Thu, 17 Jul 2003 13:43:59 +0000 Subject: Merge Jose's documentation and core Mesa changes from embedded branch --- src/mesa/main/pixel.c | 198 +++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 196 insertions(+), 2 deletions(-) (limited to 'src/mesa/main/pixel.c') diff --git a/src/mesa/main/pixel.c b/src/mesa/main/pixel.c index db378226f8..ce4be7eadc 100644 --- a/src/mesa/main/pixel.c +++ b/src/mesa/main/pixel.c @@ -776,8 +776,6 @@ _mesa_PixelTransferi( GLenum pname, GLint param ) _mesa_PixelTransferf( pname, (GLfloat) param ); } - - /**********************************************************************/ /***** Pixel processing functions ******/ /**********************************************************************/ @@ -1326,3 +1324,199 @@ _mesa_chan_to_float_span(const GLcontext *ctx, GLuint n, } #endif } + +/**********************************************************************/ +/***** State Management *****/ +/**********************************************************************/ + +/* + * Return a bitmask of IMAGE_*_BIT flags which to indicate which + * pixel transfer operations are enabled. + */ +static void +update_image_transfer_state(GLcontext *ctx) +{ + GLuint mask = 0; + + if (ctx->Pixel.RedScale != 1.0F || ctx->Pixel.RedBias != 0.0F || + ctx->Pixel.GreenScale != 1.0F || ctx->Pixel.GreenBias != 0.0F || + ctx->Pixel.BlueScale != 1.0F || ctx->Pixel.BlueBias != 0.0F || + ctx->Pixel.AlphaScale != 1.0F || ctx->Pixel.AlphaBias != 0.0F) + mask |= IMAGE_SCALE_BIAS_BIT; + + if (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset) + mask |= IMAGE_SHIFT_OFFSET_BIT; + + if (ctx->Pixel.MapColorFlag) + mask |= IMAGE_MAP_COLOR_BIT; + + if (ctx->Pixel.ColorTableEnabled) + mask |= IMAGE_COLOR_TABLE_BIT; + + if (ctx->Pixel.Convolution1DEnabled || + ctx->Pixel.Convolution2DEnabled || + ctx->Pixel.Separable2DEnabled) { + mask |= IMAGE_CONVOLUTION_BIT; + if (ctx->Pixel.PostConvolutionScale[0] != 1.0F || + ctx->Pixel.PostConvolutionScale[1] != 1.0F || + ctx->Pixel.PostConvolutionScale[2] != 1.0F || + ctx->Pixel.PostConvolutionScale[3] != 1.0F || + ctx->Pixel.PostConvolutionBias[0] != 0.0F || + ctx->Pixel.PostConvolutionBias[1] != 0.0F || + ctx->Pixel.PostConvolutionBias[2] != 0.0F || + ctx->Pixel.PostConvolutionBias[3] != 0.0F) { + mask |= IMAGE_POST_CONVOLUTION_SCALE_BIAS; + } + } + + if (ctx->Pixel.PostConvolutionColorTableEnabled) + mask |= IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT; + + if (ctx->ColorMatrixStack.Top->type != MATRIX_IDENTITY || + ctx->Pixel.PostColorMatrixScale[0] != 1.0F || + ctx->Pixel.PostColorMatrixBias[0] != 0.0F || + ctx->Pixel.PostColorMatrixScale[1] != 1.0F || + ctx->Pixel.PostColorMatrixBias[1] != 0.0F || + ctx->Pixel.PostColorMatrixScale[2] != 1.0F || + ctx->Pixel.PostColorMatrixBias[2] != 0.0F || + ctx->Pixel.PostColorMatrixScale[3] != 1.0F || + ctx->Pixel.PostColorMatrixBias[3] != 0.0F) + mask |= IMAGE_COLOR_MATRIX_BIT; + + if (ctx->Pixel.PostColorMatrixColorTableEnabled) + mask |= IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT; + + if (ctx->Pixel.HistogramEnabled) + mask |= IMAGE_HISTOGRAM_BIT; + + if (ctx->Pixel.MinMaxEnabled) + mask |= IMAGE_MIN_MAX_BIT; + + ctx->_ImageTransferState = mask; +} + + +void _mesa_update_pixel( GLcontext *ctx, GLuint new_state ) +{ + if (new_state & _NEW_COLOR_MATRIX) + _math_matrix_analyse( ctx->ColorMatrixStack.Top ); + + /* References ColorMatrix.type (derived above). + */ + if (new_state & _IMAGE_NEW_TRANSFER_STATE) + update_image_transfer_state(ctx); +} + + +/**********************************************************************/ +/***** Initialization *****/ +/**********************************************************************/ + +void _mesa_init_pixel( GLcontext * ctx ) +{ + int i; + + /* Pixel group */ + ctx->Pixel.RedBias = 0.0; + ctx->Pixel.RedScale = 1.0; + ctx->Pixel.GreenBias = 0.0; + ctx->Pixel.GreenScale = 1.0; + ctx->Pixel.BlueBias = 0.0; + ctx->Pixel.BlueScale = 1.0; + ctx->Pixel.AlphaBias = 0.0; + ctx->Pixel.AlphaScale = 1.0; + ctx->Pixel.DepthBias = 0.0; + ctx->Pixel.DepthScale = 1.0; + ctx->Pixel.IndexOffset = 0; + ctx->Pixel.IndexShift = 0; + ctx->Pixel.ZoomX = 1.0; + ctx->Pixel.ZoomY = 1.0; + ctx->Pixel.MapColorFlag = GL_FALSE; + ctx->Pixel.MapStencilFlag = GL_FALSE; + ctx->Pixel.MapStoSsize = 1; + ctx->Pixel.MapItoIsize = 1; + ctx->Pixel.MapItoRsize = 1; + ctx->Pixel.MapItoGsize = 1; + ctx->Pixel.MapItoBsize = 1; + ctx->Pixel.MapItoAsize = 1; + ctx->Pixel.MapRtoRsize = 1; + ctx->Pixel.MapGtoGsize = 1; + ctx->Pixel.MapBtoBsize = 1; + ctx->Pixel.MapAtoAsize = 1; + ctx->Pixel.MapStoS[0] = 0; + ctx->Pixel.MapItoI[0] = 0; + ctx->Pixel.MapItoR[0] = 0.0; + ctx->Pixel.MapItoG[0] = 0.0; + ctx->Pixel.MapItoB[0] = 0.0; + ctx->Pixel.MapItoA[0] = 0.0; + ctx->Pixel.MapItoR8[0] = 0; + ctx->Pixel.MapItoG8[0] = 0; + ctx->Pixel.MapItoB8[0] = 0; + ctx->Pixel.MapItoA8[0] = 0; + ctx->Pixel.MapRtoR[0] = 0.0; + ctx->Pixel.MapGtoG[0] = 0.0; + ctx->Pixel.MapBtoB[0] = 0.0; + ctx->Pixel.MapAtoA[0] = 0.0; + ctx->Pixel.HistogramEnabled = GL_FALSE; + ctx->Pixel.MinMaxEnabled = GL_FALSE; + ctx->Pixel.PixelTextureEnabled = GL_FALSE; + ctx->Pixel.FragmentRgbSource = GL_PIXEL_GROUP_COLOR_SGIS; + ctx->Pixel.FragmentAlphaSource = GL_PIXEL_GROUP_COLOR_SGIS; + ASSIGN_4V(ctx->Pixel.PostColorMatrixScale, 1.0, 1.0, 1.0, 1.0); + ASSIGN_4V(ctx->Pixel.PostColorMatrixBias, 0.0, 0.0, 0.0, 0.0); + ASSIGN_4V(ctx->Pixel.ColorTableScale, 1.0, 1.0, 1.0, 1.0); + ASSIGN_4V(ctx->Pixel.ColorTableBias, 0.0, 0.0, 0.0, 0.0); + ASSIGN_4V(ctx->Pixel.PCCTscale, 1.0, 1.0, 1.0, 1.0); + ASSIGN_4V(ctx->Pixel.PCCTbias, 0.0, 0.0, 0.0, 0.0); + ASSIGN_4V(ctx->Pixel.PCMCTscale, 1.0, 1.0, 1.0, 1.0); + ASSIGN_4V(ctx->Pixel.PCMCTbias, 0.0, 0.0, 0.0, 0.0); + ctx->Pixel.ColorTableEnabled = GL_FALSE; + ctx->Pixel.PostConvolutionColorTableEnabled = GL_FALSE; + ctx->Pixel.PostColorMatrixColorTableEnabled = GL_FALSE; + ctx->Pixel.Convolution1DEnabled = GL_FALSE; + ctx->Pixel.Convolution2DEnabled = GL_FALSE; + ctx->Pixel.Separable2DEnabled = GL_FALSE; + for (i = 0; i < 3; i++) { + ASSIGN_4V(ctx->Pixel.ConvolutionBorderColor[i], 0.0, 0.0, 0.0, 0.0); + ctx->Pixel.ConvolutionBorderMode[i] = GL_REDUCE; + ASSIGN_4V(ctx->Pixel.ConvolutionFilterScale[i], 1.0, 1.0, 1.0, 1.0); + ASSIGN_4V(ctx->Pixel.ConvolutionFilterBias[i], 0.0, 0.0, 0.0, 0.0); + } + for (i = 0; i < MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_WIDTH * 4; i++) { + ctx->Convolution1D.Filter[i] = 0.0; + ctx->Convolution2D.Filter[i] = 0.0; + ctx->Separable2D.Filter[i] = 0.0; + } + ASSIGN_4V(ctx->Pixel.PostConvolutionScale, 1.0, 1.0, 1.0, 1.0); + ASSIGN_4V(ctx->Pixel.PostConvolutionBias, 0.0, 0.0, 0.0, 0.0); + + /* Pixel transfer */ + ctx->Pack.Alignment = 4; + ctx->Pack.RowLength = 0; + ctx->Pack.ImageHeight = 0; + ctx->Pack.SkipPixels = 0; + ctx->Pack.SkipRows = 0; + ctx->Pack.SkipImages = 0; + ctx->Pack.SwapBytes = GL_FALSE; + ctx->Pack.LsbFirst = GL_FALSE; + ctx->Unpack.Alignment = 4; + ctx->Unpack.RowLength = 0; + ctx->Unpack.ImageHeight = 0; + ctx->Unpack.SkipPixels = 0; + ctx->Unpack.SkipRows = 0; + ctx->Unpack.SkipImages = 0; + ctx->Unpack.SwapBytes = GL_FALSE; + ctx->Unpack.LsbFirst = GL_FALSE; + + if (ctx->Visual.doubleBufferMode) { + ctx->Pixel.ReadBuffer = GL_BACK; + ctx->Pixel._ReadSrcMask = BACK_LEFT_BIT; + } + else { + ctx->Pixel.ReadBuffer = GL_FRONT; + ctx->Pixel._ReadSrcMask = FRONT_LEFT_BIT; + } + + /* Miscellaneous */ + ctx->_ImageTransferState = 0; +} -- cgit v1.2.3