-/* $Id: convolve.c,v 1.3 2000/08/22 18:54:25 brianp Exp $ */
+/* $Id: convolve.c,v 1.4 2000/08/23 14:31:25 brianp Exp $ */
/*
* Mesa 3-D graphics library
#include "glheader.h"
#include "convolve.h"
#include "context.h"
+#include "image.h"
+#include "span.h"
#include "types.h"
#endif
+/*
+ * Given an internalFormat token passed to glConvolutionFilter
+ * or glSeparableFilter, return the corresponding base format.
+ * Return -1 if invalid token.
+ */
+static GLint
+base_filter_format( GLenum format )
+{
+ switch (format) {
+ case GL_ALPHA:
+ case GL_ALPHA4:
+ case GL_ALPHA8:
+ case GL_ALPHA12:
+ case GL_ALPHA16:
+ return GL_ALPHA;
+ case GL_LUMINANCE:
+ case GL_LUMINANCE4:
+ case GL_LUMINANCE8:
+ case GL_LUMINANCE12:
+ case GL_LUMINANCE16:
+ return GL_LUMINANCE;
+ case GL_LUMINANCE_ALPHA:
+ case GL_LUMINANCE4_ALPHA4:
+ case GL_LUMINANCE6_ALPHA2:
+ case GL_LUMINANCE8_ALPHA8:
+ case GL_LUMINANCE12_ALPHA4:
+ case GL_LUMINANCE12_ALPHA12:
+ case GL_LUMINANCE16_ALPHA16:
+ return GL_LUMINANCE_ALPHA;
+ case GL_INTENSITY:
+ case GL_INTENSITY4:
+ case GL_INTENSITY8:
+ case GL_INTENSITY12:
+ case GL_INTENSITY16:
+ return GL_INTENSITY;
+ case GL_RGB:
+ case GL_R3_G3_B2:
+ case GL_RGB4:
+ case GL_RGB5:
+ case GL_RGB8:
+ case GL_RGB10:
+ case GL_RGB12:
+ case GL_RGB16:
+ return GL_RGB;
+ case 4:
+ case GL_RGBA:
+ case GL_RGBA2:
+ case GL_RGBA4:
+ case GL_RGB5_A1:
+ case GL_RGBA8:
+ case GL_RGB10_A2:
+ case GL_RGBA12:
+ case GL_RGBA16:
+ return GL_RGBA;
+ default:
+ return -1; /* error */
+ }
+}
+
+
+void
+_mesa_ConvolutionFilter1D(GLenum target, GLenum internalFormat, GLsizei width, GLenum format, GLenum type, const GLvoid *image)
+{
+ GLenum baseFormat;
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glConvolutionFilter1D");
+
+ if (target != GL_CONVOLUTION_1D) {
+ gl_error(ctx, GL_INVALID_ENUM, "glConvolutionFilter1D(target)");
+ return;
+ }
+
+ baseFormat = base_filter_format(internalFormat);
+ if (baseFormat < 0 || baseFormat == GL_COLOR_INDEX) {
+ gl_error(ctx, GL_INVALID_ENUM, "glConvolutionFilter1D(internalFormat)");
+ return;
+ }
+
+ if (width < 0 || width > MAX_CONVOLUTION_WIDTH) {
+ gl_error(ctx, GL_INVALID_VALUE, "glConvolutionFilter1D(width)");
+ return;
+ }
+
+ if (!_mesa_is_legal_format_and_type(format, type) ||
+ format == GL_COLOR_INDEX ||
+ format == GL_STENCIL_INDEX ||
+ format == GL_DEPTH_COMPONENT ||
+ format == GL_INTENSITY ||
+ type == GL_BITMAP) {
+ gl_error(ctx, GL_INVALID_ENUM, "glConvolutionFilter1D(format or type)");
+ return;
+ }
+
+ ctx->Convolution1D.Format = format;
+ ctx->Convolution1D.InternalFormat = internalFormat;
+ ctx->Convolution1D.Width = width;
+ ctx->Convolution1D.Height = 1;
+
+ /* unpack filter image */
+ _mesa_unpack_float_color_span(ctx, width, GL_RGBA,
+ ctx->Convolution1D.Filter,
+ format, type, image, &ctx->Unpack,
+ 0, GL_FALSE);
+
+ /* apply scale and bias */
+ {
+ const GLfloat *scale = ctx->Pixel.ConvolutionFilterScale[0];
+ const GLfloat *bias = ctx->Pixel.ConvolutionFilterBias[0];
+ GLint i;
+ for (i = 0; i < width; i++) {
+ GLfloat r = ctx->Convolution1D.Filter[i * 4 + 0];
+ GLfloat g = ctx->Convolution1D.Filter[i * 4 + 1];
+ GLfloat b = ctx->Convolution1D.Filter[i * 4 + 2];
+ GLfloat a = ctx->Convolution1D.Filter[i * 4 + 3];
+ r = r * scale[0] + bias[0];
+ g = g * scale[1] + bias[1];
+ b = b * scale[2] + bias[2];
+ a = a * scale[3] + bias[3];
+ ctx->Convolution1D.Filter[i * 4 + 0] = r;
+ ctx->Convolution1D.Filter[i * 4 + 1] = g;
+ ctx->Convolution1D.Filter[i * 4 + 2] = b;
+ ctx->Convolution1D.Filter[i * 4 + 3] = a;
+ }
+ }
+}
+
+
+void
+_mesa_ConvolutionFilter2D(GLenum target, GLenum internalFormat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *image)
+{
+ GLenum baseFormat;
+ GLint i, components;
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glConvolutionFilter2D");
+
+ if (target != GL_CONVOLUTION_2D) {
+ gl_error(ctx, GL_INVALID_ENUM, "glConvolutionFilter2D(target)");
+ return;
+ }
+
+ baseFormat = base_filter_format(internalFormat);
+ if (baseFormat < 0 || baseFormat == GL_COLOR_INDEX) {
+ gl_error(ctx, GL_INVALID_ENUM, "glConvolutionFilter2D(internalFormat)");
+ return;
+ }
+
+ if (width < 0 || width > MAX_CONVOLUTION_WIDTH) {
+ gl_error(ctx, GL_INVALID_VALUE, "glConvolutionFilter2D(width)");
+ return;
+ }
+ if (height < 0 || height > MAX_CONVOLUTION_HEIGHT) {
+ gl_error(ctx, GL_INVALID_VALUE, "glConvolutionFilter2D(height)");
+ return;
+ }
+
+ if (!_mesa_is_legal_format_and_type(format, type) ||
+ format == GL_COLOR_INDEX ||
+ format == GL_STENCIL_INDEX ||
+ format == GL_DEPTH_COMPONENT ||
+ format == GL_INTENSITY ||
+ type == GL_BITMAP) {
+ gl_error(ctx, GL_INVALID_ENUM, "glConvolutionFilter2D(format or type)");
+ return;
+ }
+
+ components = _mesa_components_in_format(format);
+ assert(components > 0); /* this should have been caught earlier */
+
+ ctx->Convolution2D.Format = format;
+ ctx->Convolution2D.InternalFormat = internalFormat;
+ ctx->Convolution2D.Width = width;
+ ctx->Convolution2D.Height = height;
+
+ /* Unpack filter image. We always store filters in RGBA format. */
+ for (i = 0; i < height; i++) {
+ const GLvoid *src = _mesa_image_address(&ctx->Unpack, image, width,
+ height, format, type, 0, i, 0);
+ GLfloat *dst = ctx->Convolution2D.Filter + i * width * 4;
+ _mesa_unpack_float_color_span(ctx, width, GL_RGBA, dst,
+ format, type, src, &ctx->Unpack,
+ 0, GL_FALSE);
+ }
+
+ /* apply scale and bias */
+ {
+ const GLfloat *scale = ctx->Pixel.ConvolutionFilterScale[1];
+ const GLfloat *bias = ctx->Pixel.ConvolutionFilterBias[1];
+ for (i = 0; i < width * height * 4; i++) {
+ GLfloat r = ctx->Convolution2D.Filter[i * 4 + 0];
+ GLfloat g = ctx->Convolution2D.Filter[i * 4 + 1];
+ GLfloat b = ctx->Convolution2D.Filter[i * 4 + 2];
+ GLfloat a = ctx->Convolution2D.Filter[i * 4 + 3];
+ r = r * scale[0] + bias[0];
+ g = g * scale[1] + bias[1];
+ b = b * scale[2] + bias[2];
+ a = a * scale[3] + bias[3];
+ ctx->Convolution2D.Filter[i * 4 + 0] = r;
+ ctx->Convolution2D.Filter[i * 4 + 1] = g;
+ ctx->Convolution2D.Filter[i * 4 + 2] = b;
+ ctx->Convolution2D.Filter[i * 4 + 3] = a;
+ }
+ }
+}
+
+
+void
+_mesa_ConvolutionParameterf(GLenum target, GLenum pname, GLfloat param)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ GLuint c;
+
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glConvolutionParameterf");
+
+ switch (target) {
+ case GL_CONVOLUTION_1D:
+ c = 0;
+ break;
+ case GL_CONVOLUTION_2D:
+ c = 1;
+ break;
+ case GL_SEPARABLE_2D:
+ c = 2;
+ break;
+ default:
+ gl_error(ctx, GL_INVALID_ENUM, "glConvolutionParameterf(target)");
+ return;
+ }
+
+ switch (pname) {
+ case GL_CONVOLUTION_BORDER_MODE:
+ if (param == (GLfloat) GL_REDUCE ||
+ param == (GLfloat) GL_CONSTANT_BORDER ||
+ param == (GLfloat) GL_REPLICATE_BORDER) {
+ ctx->Pixel.ConvolutionBorderMode[c] = (GLenum) param;
+ }
+ else {
+ gl_error(ctx, GL_INVALID_ENUM, "glConvolutionParameterf(params)");
+ return;
+ }
+ break;
+ default:
+ gl_error(ctx, GL_INVALID_ENUM, "glConvolutionParameterf(pname)");
+ return;
+ }
+}
+
+
+void
+_mesa_ConvolutionParameterfv(GLenum target, GLenum pname, const GLfloat *params)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct gl_convolution_attrib *conv;
+ GLuint c;
+
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glConvolutionParameterfv");
+
+ switch (target) {
+ case GL_CONVOLUTION_1D:
+ c = 0;
+ conv = &ctx->Convolution1D;
+ break;
+ case GL_CONVOLUTION_2D:
+ c = 1;
+ conv = &ctx->Convolution2D;
+ break;
+ case GL_SEPARABLE_2D:
+ c = 2;
+ conv = &ctx->Separable2D;
+ break;
+ default:
+ gl_error(ctx, GL_INVALID_ENUM, "glConvolutionParameterfv(target)");
+ return;
+ }
+
+ switch (pname) {
+ case GL_CONVOLUTION_BORDER_COLOR:
+ COPY_4V(ctx->Pixel.ConvolutionBorderColor[c], params);
+ break;
+ case GL_CONVOLUTION_BORDER_MODE:
+ if (params[0] == (GLfloat) GL_REDUCE ||
+ params[0] == (GLfloat) GL_CONSTANT_BORDER ||
+ params[0] == (GLfloat) GL_REPLICATE_BORDER) {
+ ctx->Pixel.ConvolutionBorderMode[c] = (GLenum) params[0];
+ }
+ else {
+ gl_error(ctx, GL_INVALID_ENUM, "glConvolutionParameterfv(params)");
+ return;
+ }
+ break;
+ case GL_CONVOLUTION_FILTER_SCALE:
+ COPY_4V(ctx->Pixel.ConvolutionFilterScale[c], params);
+ break;
+ case GL_CONVOLUTION_FILTER_BIAS:
+ COPY_4V(ctx->Pixel.ConvolutionFilterBias[c], params);
+ break;
+ default:
+ gl_error(ctx, GL_INVALID_ENUM, "glConvolutionParameterfv(pname)");
+ return;
+ }
+}
+
+
+void
+_mesa_ConvolutionParameteri(GLenum target, GLenum pname, GLint param)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ GLuint c;
+
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glConvolutionParameteri");
+
+ switch (target) {
+ case GL_CONVOLUTION_1D:
+ c = 0;
+ break;
+ case GL_CONVOLUTION_2D:
+ c = 1;
+ break;
+ case GL_SEPARABLE_2D:
+ c = 2;
+ break;
+ default:
+ gl_error(ctx, GL_INVALID_ENUM, "glConvolutionParameteri(target)");
+ return;
+ }
+
+ switch (pname) {
+ case GL_CONVOLUTION_BORDER_MODE:
+ if (param == (GLint) GL_REDUCE ||
+ param == (GLint) GL_CONSTANT_BORDER ||
+ param == (GLint) GL_REPLICATE_BORDER) {
+ ctx->Pixel.ConvolutionBorderMode[c] = (GLenum) param;
+ }
+ else {
+ gl_error(ctx, GL_INVALID_ENUM, "glConvolutionParameteri(params)");
+ return;
+ }
+ break;
+ default:
+ gl_error(ctx, GL_INVALID_ENUM, "glConvolutionParameteri(pname)");
+ return;
+ }
+}
+
+
+void
+_mesa_ConvolutionParameteriv(GLenum target, GLenum pname, const GLint *params)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct gl_convolution_attrib *conv;
+ GLuint c;
+
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glConvolutionParameteriv");
+
+ switch (target) {
+ case GL_CONVOLUTION_1D:
+ c = 0;
+ conv = &ctx->Convolution1D;
+ break;
+ case GL_CONVOLUTION_2D:
+ c = 1;
+ conv = &ctx->Convolution2D;
+ break;
+ case GL_SEPARABLE_2D:
+ c = 2;
+ conv = &ctx->Separable2D;
+ break;
+ default:
+ gl_error(ctx, GL_INVALID_ENUM, "glConvolutionParameteriv(target)");
+ return;
+ }
+
+ switch (pname) {
+ case GL_CONVOLUTION_BORDER_COLOR:
+ ctx->Pixel.ConvolutionBorderColor[c][0] = INT_TO_FLOAT(params[0]);
+ ctx->Pixel.ConvolutionBorderColor[c][1] = INT_TO_FLOAT(params[1]);
+ ctx->Pixel.ConvolutionBorderColor[c][2] = INT_TO_FLOAT(params[2]);
+ ctx->Pixel.ConvolutionBorderColor[c][3] = INT_TO_FLOAT(params[3]);
+ break;
+ case GL_CONVOLUTION_BORDER_MODE:
+ if (params[0] == (GLint) GL_REDUCE ||
+ params[0] == (GLint) GL_CONSTANT_BORDER ||
+ params[0] == (GLint) GL_REPLICATE_BORDER) {
+ ctx->Pixel.ConvolutionBorderMode[c] = (GLenum) params[0];
+ }
+ else {
+ gl_error(ctx, GL_INVALID_ENUM, "glConvolutionParameteriv(params)");
+ return;
+ }
+ break;
+ case GL_CONVOLUTION_FILTER_SCALE:
+ COPY_4V(ctx->Pixel.ConvolutionFilterScale[c], params);
+ break;
+ case GL_CONVOLUTION_FILTER_BIAS:
+ COPY_4V(ctx->Pixel.ConvolutionFilterBias[c], params);
+ break;
+ default:
+ gl_error(ctx, GL_INVALID_ENUM, "glConvolutionParameteriv(pname)");
+ return;
+ }
+}
+
+
+void
+_mesa_CopyConvolutionFilter1D(GLenum target, GLenum internalFormat, GLint x, GLint y, GLsizei width)
+{
+ GLenum baseFormat;
+ GLfloat rgba[MAX_CONVOLUTION_WIDTH][4];
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCopyConvolutionFilter1D");
+
+ if (target != GL_CONVOLUTION_1D) {
+ gl_error(ctx, GL_INVALID_ENUM, "glCopyConvolutionFilter1D(target)");
+ return;
+ }
+
+ baseFormat = base_filter_format(internalFormat);
+ if (baseFormat < 0 || baseFormat == GL_COLOR_INDEX) {
+ gl_error(ctx, GL_INVALID_ENUM, "glCopyConvolutionFilter1D(internalFormat)");
+ return;
+ }
+
+ if (width < 0 || width > MAX_CONVOLUTION_WIDTH) {
+ gl_error(ctx, GL_INVALID_VALUE, "glCopyConvolutionFilter1D(width)");
+ return;
+ }
+
+ /* read pixels from framebuffer */
+ gl_read_rgba_span(ctx, ctx->ReadBuffer, width, x, y, (GLubyte (*)[4]) rgba);
+
+ /* store as convolution filter */
+ _mesa_ConvolutionFilter1D(target, internalFormat, width,
+ GL_RGBA, GL_UNSIGNED_BYTE, rgba);
+}
+
+
+void
+_mesa_CopyConvolutionFilter2D(GLenum target, GLenum internalFormat, GLint x, GLint y, GLsizei width, GLsizei height)
+{
+ GLenum baseFormat;
+ GLint i;
+ struct gl_pixelstore_attrib packSave;
+ GLfloat rgba[MAX_CONVOLUTION_HEIGHT][MAX_CONVOLUTION_WIDTH][4];
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCopyConvolutionFilter2D");
+
+ if (target != GL_CONVOLUTION_2D) {
+ gl_error(ctx, GL_INVALID_ENUM, "glCopyConvolutionFilter2D(target)");
+ return;
+ }
+
+ baseFormat = base_filter_format(internalFormat);
+ if (baseFormat < 0 || baseFormat == GL_COLOR_INDEX) {
+ gl_error(ctx, GL_INVALID_ENUM, "glCopyConvolutionFilter2D(internalFormat)");
+ return;
+ }
+
+ if (width < 0 || width > MAX_CONVOLUTION_WIDTH) {
+ gl_error(ctx, GL_INVALID_VALUE, "glCopyConvolutionFilter2D(width)");
+ return;
+ }
+ if (height < 0 || height > MAX_CONVOLUTION_HEIGHT) {
+ gl_error(ctx, GL_INVALID_VALUE, "glCopyConvolutionFilter2D(height)");
+ return;
+ }
+
+ /* read pixels from framebuffer */
+ for (i = 0; i < height; i++) {
+ gl_read_rgba_span(ctx, ctx->ReadBuffer, width, x, y + i,
+ (GLubyte (*)[4]) rgba[i]);
+ }
+
+ /*
+ * store as convolution filter
+ */
+ packSave = ctx->Unpack; /* save pixel packing params */
+
+ ctx->Unpack.Alignment = 1;
+ ctx->Unpack.RowLength = MAX_CONVOLUTION_WIDTH;
+ ctx->Unpack.SkipPixels = 0;
+ ctx->Unpack.SkipRows = 0;
+ ctx->Unpack.ImageHeight = 0;
+ ctx->Unpack.SkipImages = 0;
+ ctx->Unpack.SwapBytes = GL_FALSE;
+ ctx->Unpack.LsbFirst = GL_FALSE;
+
+ _mesa_ConvolutionFilter2D(target, internalFormat, width, height,
+ GL_RGBA, GL_UNSIGNED_BYTE, rgba);
+
+ ctx->Unpack = packSave; /* restore pixel packing params */
+}
+
+
+void
+_mesa_GetConvolutionFilter(GLenum target, GLenum format, GLenum type, GLvoid *image)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glGetConvolutionFilter");
+
+ if (target != GL_CONVOLUTION_1D && target != GL_CONVOLUTION_2D) {
+ gl_error(ctx, GL_INVALID_ENUM, "glGetConvolutionFilter(target)");
+ return;
+ }
+
+ if (!_mesa_is_legal_format_and_type(format, type) ||
+ format == GL_COLOR_INDEX ||
+ format == GL_STENCIL_INDEX ||
+ format == GL_DEPTH_COMPONENT ||
+ format == GL_INTENSITY ||
+ type == GL_BITMAP) {
+ gl_error(ctx, GL_INVALID_ENUM, "glGetConvolutionFilter(format or type)");
+ return;
+ }
+
+ (void) image;
+ /* XXX store image */
+}
+
+
+void
+_mesa_GetConvolutionParameterfv(GLenum target, GLenum pname, GLfloat *params)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ const struct gl_convolution_attrib *conv;
+ GLuint c;
+
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glGetConvolutionParameterfv");
+
+ switch (target) {
+ case GL_CONVOLUTION_1D:
+ c = 0;
+ conv = &ctx->Convolution1D;
+ break;
+ case GL_CONVOLUTION_2D:
+ c = 1;
+ conv = &ctx->Convolution2D;
+ break;
+ case GL_SEPARABLE_2D:
+ c = 2;
+ conv = &ctx->Separable2D;
+ break;
+ default:
+ gl_error(ctx, GL_INVALID_ENUM, "glGetConvolutionParameterfv(target)");
+ return;
+ }
+
+ switch (pname) {
+ case GL_CONVOLUTION_BORDER_COLOR:
+ COPY_4V(params, ctx->Pixel.ConvolutionBorderColor[c]);
+ break;
+ case GL_CONVOLUTION_BORDER_MODE:
+ *params = (GLfloat) ctx->Pixel.ConvolutionBorderMode[c];
+ break;
+ case GL_CONVOLUTION_FILTER_SCALE:
+ COPY_4V(params, ctx->Pixel.ConvolutionFilterScale[c]);
+ break;
+ case GL_CONVOLUTION_FILTER_BIAS:
+ COPY_4V(params, ctx->Pixel.ConvolutionFilterBias[c]);
+ break;
+ case GL_CONVOLUTION_FORMAT:
+ *params = (GLfloat) conv->Format;
+ break;
+ case GL_CONVOLUTION_WIDTH:
+ *params = (GLfloat) conv->Width;
+ break;
+ case GL_CONVOLUTION_HEIGHT:
+ *params = (GLfloat) conv->Height;
+ break;
+ case GL_MAX_CONVOLUTION_WIDTH:
+ *params = (GLfloat) ctx->Const.MaxConvolutionWidth;
+ break;
+ case GL_MAX_CONVOLUTION_HEIGHT:
+ *params = (GLfloat) ctx->Const.MaxConvolutionHeight;
+ break;
+ default:
+ gl_error(ctx, GL_INVALID_ENUM, "glGetConvolutionParameterfv(pname)");
+ return;
+ }
+}
+
+
+void
+_mesa_GetConvolutionParameteriv(GLenum target, GLenum pname, GLint *params)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ const struct gl_convolution_attrib *conv;
+ GLuint c;
+
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glGetConvolutionParameteriv");
+
+ switch (target) {
+ case GL_CONVOLUTION_1D:
+ c = 0;
+ conv = &ctx->Convolution1D;
+ break;
+ case GL_CONVOLUTION_2D:
+ c = 1;
+ conv = &ctx->Convolution2D;
+ break;
+ case GL_SEPARABLE_2D:
+ c = 2;
+ conv = &ctx->Separable2D;
+ break;
+ default:
+ gl_error(ctx, GL_INVALID_ENUM, "glGetConvolutionParameteriv(target)");
+ return;
+ }
+
+ switch (pname) {
+ case GL_CONVOLUTION_BORDER_COLOR:
+ params[0] = FLOAT_TO_INT(ctx->Pixel.ConvolutionBorderColor[c][0]);
+ params[1] = FLOAT_TO_INT(ctx->Pixel.ConvolutionBorderColor[c][1]);
+ params[2] = FLOAT_TO_INT(ctx->Pixel.ConvolutionBorderColor[c][2]);
+ params[3] = FLOAT_TO_INT(ctx->Pixel.ConvolutionBorderColor[c][3]);
+ break;
+ case GL_CONVOLUTION_BORDER_MODE:
+ *params = (GLint) ctx->Pixel.ConvolutionBorderMode[c];
+ break;
+ case GL_CONVOLUTION_FILTER_SCALE:
+ params[0] = (GLint) ctx->Pixel.ConvolutionFilterScale[c][0];
+ params[1] = (GLint) ctx->Pixel.ConvolutionFilterScale[c][1];
+ params[2] = (GLint) ctx->Pixel.ConvolutionFilterScale[c][2];
+ params[3] = (GLint) ctx->Pixel.ConvolutionFilterScale[c][3];
+ break;
+ case GL_CONVOLUTION_FILTER_BIAS:
+ params[0] = (GLint) ctx->Pixel.ConvolutionFilterBias[c][0];
+ params[1] = (GLint) ctx->Pixel.ConvolutionFilterBias[c][1];
+ params[2] = (GLint) ctx->Pixel.ConvolutionFilterBias[c][2];
+ params[3] = (GLint) ctx->Pixel.ConvolutionFilterBias[c][3];
+ break;
+ case GL_CONVOLUTION_FORMAT:
+ *params = (GLint) conv->Format;
+ break;
+ case GL_CONVOLUTION_WIDTH:
+ *params = (GLint) conv->Width;
+ break;
+ case GL_CONVOLUTION_HEIGHT:
+ *params = (GLint) conv->Height;
+ break;
+ case GL_MAX_CONVOLUTION_WIDTH:
+ *params = (GLint) ctx->Const.MaxConvolutionWidth;
+ break;
+ case GL_MAX_CONVOLUTION_HEIGHT:
+ *params = (GLint) ctx->Const.MaxConvolutionHeight;
+ break;
+ default:
+ gl_error(ctx, GL_INVALID_ENUM, "glGetConvolutionParameteriv(pname)");
+ return;
+ }
+}
+
+
+void
+_mesa_GetSeparableFilter(GLenum target, GLenum format, GLenum type, GLvoid *row, GLvoid *column, GLvoid *span)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glGetSeparableFilter");
+
+ if (target != GL_SEPARABLE_2D) {
+ gl_error(ctx, GL_INVALID_ENUM, "glGetSeparableFilter(target)");
+ return;
+ }
+
+ if (!_mesa_is_legal_format_and_type(format, type) ||
+ format == GL_COLOR_INDEX ||
+ format == GL_STENCIL_INDEX ||
+ format == GL_DEPTH_COMPONENT ||
+ format == GL_INTENSITY ||
+ type == GL_BITMAP) {
+ gl_error(ctx, GL_INVALID_ENUM, "glGetConvolutionFilter(format or type)");
+ return;
+ }
+
+ /* XXX to do */
+ (void) row;
+ (void) column;
+ (void) span;
+}
+
+
+void
+_mesa_SeparableFilter2D(GLenum target, GLenum internalFormat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *row, const GLvoid *column)
+{
+ const GLint colStart = MAX_CONVOLUTION_WIDTH * 4;
+ GLenum baseFormat;
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glSeparableFilter2D");
+
+ if (target != GL_SEPARABLE_2D) {
+ gl_error(ctx, GL_INVALID_ENUM, "glSeparableFilter2D(target)");
+ return;
+ }
+
+ baseFormat = base_filter_format(internalFormat);
+ if (baseFormat < 0 || baseFormat == GL_COLOR_INDEX) {
+ gl_error(ctx, GL_INVALID_ENUM, "glSeparableFilter2D(internalFormat)");
+ return;
+ }
+
+ if (width < 0 || width > MAX_CONVOLUTION_WIDTH) {
+ gl_error(ctx, GL_INVALID_VALUE, "glSeparableFilter2D(width)");
+ return;
+ }
+ if (height < 0 || height > MAX_CONVOLUTION_HEIGHT) {
+ gl_error(ctx, GL_INVALID_VALUE, "glSeparableFilter2D(height)");
+ return;
+ }
+
+ if (!_mesa_is_legal_format_and_type(format, type) ||
+ format == GL_COLOR_INDEX ||
+ format == GL_STENCIL_INDEX ||
+ format == GL_DEPTH_COMPONENT ||
+ format == GL_INTENSITY ||
+ type == GL_BITMAP) {
+ gl_error(ctx, GL_INVALID_ENUM, "glSeparableFilter2D(format or type)");
+ return;
+ }
+
+ ctx->Separable2D.Format = format;
+ ctx->Separable2D.InternalFormat = internalFormat;
+ ctx->Separable2D.Width = width;
+ ctx->Separable2D.Height = height;
+
+ /* unpack row filter */
+ _mesa_unpack_float_color_span(ctx, width, GL_RGBA,
+ ctx->Separable2D.Filter,
+ format, type, row, &ctx->Unpack,
+ 0, GL_FALSE);
+
+ /* apply scale and bias */
+ {
+ const GLfloat *scale = ctx->Pixel.ConvolutionFilterScale[2];
+ const GLfloat *bias = ctx->Pixel.ConvolutionFilterBias[2];
+ GLint i;
+ for (i = 0; i < width; i++) {
+ GLfloat r = ctx->Separable2D.Filter[i * 4 + 0];
+ GLfloat g = ctx->Separable2D.Filter[i * 4 + 1];
+ GLfloat b = ctx->Separable2D.Filter[i * 4 + 2];
+ GLfloat a = ctx->Separable2D.Filter[i * 4 + 3];
+ r = r * scale[0] + bias[0];
+ g = g * scale[1] + bias[1];
+ b = b * scale[2] + bias[2];
+ a = a * scale[3] + bias[3];
+ ctx->Separable2D.Filter[i * 4 + 0] = r;
+ ctx->Separable2D.Filter[i * 4 + 1] = g;
+ ctx->Separable2D.Filter[i * 4 + 2] = b;
+ ctx->Separable2D.Filter[i * 4 + 3] = a;
+ }
+ }
+
+ /* unpack column filter */
+ _mesa_unpack_float_color_span(ctx, width, GL_RGBA,
+ &ctx->Separable2D.Filter[colStart],
+ format, type, column, &ctx->Unpack,
+ 0, GL_FALSE);
+
+ /* apply scale and bias */
+ {
+ const GLfloat *scale = ctx->Pixel.ConvolutionFilterScale[2];
+ const GLfloat *bias = ctx->Pixel.ConvolutionFilterBias[2];
+ GLint i;
+ for (i = 0; i < width; i++) {
+ GLfloat r = ctx->Separable2D.Filter[i * 4 + 0 + colStart];
+ GLfloat g = ctx->Separable2D.Filter[i * 4 + 1 + colStart];
+ GLfloat b = ctx->Separable2D.Filter[i * 4 + 2 + colStart];
+ GLfloat a = ctx->Separable2D.Filter[i * 4 + 3 + colStart];
+ r = r * scale[0] + bias[0];
+ g = g * scale[1] + bias[1];
+ b = b * scale[2] + bias[2];
+ a = a * scale[3] + bias[3];
+ ctx->Separable2D.Filter[i * 4 + 0 + colStart] = r;
+ ctx->Separable2D.Filter[i * 4 + 1 + colStart] = g;
+ ctx->Separable2D.Filter[i * 4 + 2 + colStart] = b;
+ ctx->Separable2D.Filter[i * 4 + 3 + colStart] = a;
+ }
+ }
+}
+
+
+/**********************************************************************/
+/*** image convolution functions ***/
+/**********************************************************************/
+
static void
convolve_1d_reduce(GLint srcWidth, const GLfloat src[][4],
GLint filterWidth, const GLfloat filter[][4],
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