Initial version of st_get_pixel_transfer_program().

For generating fragment programs which implement pixel transfer ops.

2 files changed, 167 insertions, 0 deletions

diff --git a/src/mesa/state_tracker/st_pixeltransfer.c b/src/mesa/state_tracker/st_pixeltransfer.c
new file mode 100644
index 0000000000..52e2a4c89d
--- /dev/null
+++ b/src/mesa/state_tracker/st_pixeltransfer.c
@@ -0,0 +1,131 @@
+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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, sub license, 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 (including the
+ * next paragraph) 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
+ * 
+ **************************************************************************/
+
+/*
+ * Generate fragment programs to implement pixel transfer ops, such as
+ * scale/bias, colormatrix, colortable, convolution...
+ *
+ * Authors:
+ *   Brian Paul
+ */
+
+#include "main/imports.h"
+#include "main/image.h"
+#include "main/macros.h"
+#include "shader/program.h"
+#include "shader/prog_instruction.h"
+#include "shader/prog_parameter.h"
+#include "shader/prog_print.h"
+
+#include "st_pixeltransfer.h"
+
+
+#define MAX_INST 100
+
+/**
+ * Returns a fragment program which implements the current pixel transfer ops.
+ */
+struct gl_fragment_program *
+st_get_pixel_transfer_program(GLcontext *ctx)
+{
+   struct prog_instruction inst[MAX_INST];
+   struct gl_program_parameter_list *params;
+   struct gl_fragment_program *fp;
+   GLuint ic = 0;
+
+   params = _mesa_new_parameter_list();
+
+   /* TEX result.color, fragment.texcoord[0], texture[0], 2D; */
+   _mesa_init_instructions(inst + ic, 1);
+   inst[ic].Opcode = OPCODE_TEX;
+   inst[ic].DstReg.File = PROGRAM_OUTPUT;
+   inst[ic].DstReg.Index = FRAG_RESULT_COLR;
+   inst[ic].SrcReg[0].File = PROGRAM_INPUT;
+   inst[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0;
+   inst[ic].TexSrcUnit = 0;
+   inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
+   ic++;
+
+   /* MAD result.color, result.color, scale, bias; */
+   if (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) {
+      GLfloat scale[4], bias[4];
+      GLint scale_p, bias_p;
+      scale[0] = ctx->Pixel.RedScale;
+      scale[1] = ctx->Pixel.GreenScale;
+      scale[2] = ctx->Pixel.BlueScale;
+      scale[3] = ctx->Pixel.AlphaScale;
+      bias[0] = ctx->Pixel.RedBias;
+      bias[1] = ctx->Pixel.GreenBias;
+      bias[2] = ctx->Pixel.BlueBias;
+      bias[3] = ctx->Pixel.AlphaBias;
+
+      scale_p = _mesa_add_named_constant(params, "RGBA_scale", scale, 4);
+      bias_p = _mesa_add_named_constant(params, "RGBA_bias", bias, 4);
+
+      _mesa_init_instructions(inst + ic, 1);
+      inst[ic].Opcode = OPCODE_MAD;
+      inst[ic].DstReg.File = PROGRAM_OUTPUT;
+      inst[ic].DstReg.Index = FRAG_RESULT_COLR;
+      inst[ic].SrcReg[0].File = PROGRAM_OUTPUT;
+      inst[ic].SrcReg[0].Index = FRAG_RESULT_COLR;
+      inst[ic].SrcReg[1].File = PROGRAM_CONSTANT;
+      inst[ic].SrcReg[1].Index = scale_p;
+      inst[ic].SrcReg[2].File = PROGRAM_CONSTANT;
+      inst[ic].SrcReg[2].Index = bias_p;
+      ic++;
+   }
+
+   /* END; */
+   _mesa_init_instructions(inst + ic, 1);
+   inst[ic].Opcode = OPCODE_END;
+   ic++;
+
+   assert(ic <= MAX_INST);
+
+
+   fp = (struct gl_fragment_program *)
+      ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
+   if (!fp)
+      return NULL;
+
+   fp->Base.Instructions = _mesa_alloc_instructions(ic);
+   if (!fp->Base.Instructions) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY,
+                  "generating pixel transfer program");
+      return NULL;
+   }
+
+   _mesa_copy_instructions(fp->Base.Instructions, inst,
+                           fp->Base.NumInstructions);
+
+   fp->Base.NumInstructions = ic;
+
+   return fp;
+}
diff --git a/src/mesa/state_tracker/st_pixeltransfer.h b/src/mesa/state_tracker/st_pixeltransfer.h
new file mode 100644
index 0000000000..35f0044a30
--- /dev/null
+++ b/src/mesa/state_tracker/st_pixeltransfer.h
@@ -0,0 +1,36 @@
+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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, sub license, 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 (including the
+ * next paragraph) 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
+ * 
+ **************************************************************************/
+
+
+#ifndef ST_PIXELTRANSFER_H
+#define ST_PIXELTRANSFER_H
+
+extern struct gl_fragment_program *
+st_get_pixel_transfer_program(GLcontext *ctx);
+
+
+#endif /* ST_PIXELTRANSFER_H */