initial work for textured-quad glDrawPixels

2 files changed, 316 insertions, 0 deletions

diff --git a/src/mesa/state_tracker/st_cb_drawpixels.c b/src/mesa/state_tracker/st_cb_drawpixels.c
new file mode 100644
index 0000000000..7209db00a3
--- /dev/null
+++ b/src/mesa/state_tracker/st_cb_drawpixels.c
@@ -0,0 +1,278 @@
+/**************************************************************************
+ * 
+ * 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.
+ * 
+ **************************************************************************/
+
+ /*
+  * Authors:
+  *   Brian Paul
+  */
+
+#include "imports.h"
+
+#include "tnl/t_context.h"
+#include "tnl/t_pipeline.h"
+
+#include "st_context.h"
+#include "st_atom.h"
+#include "st_draw.h"
+#include "st_cb_drawpixels.h"
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "vf/vf.h"
+
+
+static void
+draw_quad(struct st_context *st, GLfloat x, GLfloat y, GLfloat z,
+          GLsizei width, GLsizei height)
+{
+   static const GLuint attribs[2] = {
+      VF_ATTRIB_POS,
+      VF_ATTRIB_TEX0
+   };
+   GLfloat verts[4][2][4]; /* four verts, two attribs, XYZW */
+   GLuint i;
+
+   /* lower-left */
+   verts[0][0][0] = x;
+   verts[0][0][1] = y;
+   verts[0][1][0] = 0.0;
+   verts[0][1][1] = 0.0;
+
+   /* lower-right */
+   verts[1][0][0] = x + width;
+   verts[1][0][1] = y;
+   verts[1][1][0] = 1.0;
+   verts[1][1][1] = 0.0;
+
+   /* upper-right */
+   verts[2][0][0] = x + width;
+   verts[2][0][1] = y + height;
+   verts[2][1][0] = 1.0;
+   verts[2][1][1] = 1.0;
+
+   /* upper-left */
+   verts[3][0][0] = x;
+   verts[3][0][1] = y + height;
+   verts[3][1][0] = 0.0;
+   verts[3][1][1] = 11.0;
+
+   /* same for all verts: */
+   for (i = 0; i < 4; i++) {
+      verts[i][0][2] = z;   /*Z*/
+      verts[i][0][3] = 1.0; /*W*/
+      verts[i][1][2] = 0.0; /*R*/
+      verts[i][1][3] = 1.0; /*Q*/
+   }
+
+   st->pipe->draw_vertices(st->pipe, GL_QUADS,
+                           4, (GLfloat *) verts, 2, attribs);
+}
+
+
+static void
+draw_textured_quad(struct st_context *st, GLfloat x, GLfloat y, GLfloat z,
+                   GLsizei width, GLsizei height, GLenum format, GLenum type,
+                   const struct gl_pixelstore_attrib *unpack,
+                   const GLvoid *pixels)
+{
+   struct pipe_setup_state setup;
+
+   /* setup state: just scissor */
+   memset(&setup, 0, sizeof(setup));
+   if (st->ctx->Scissor.Enabled)
+      setup.scissor = 1;
+   st->pipe->set_setup_state(st->pipe, &setup);
+
+
+   /* XXX upload the texture image */
+
+   draw_quad(st, x, y, z, width, height);
+
+   /* restore GL state */
+   st->pipe->set_setup_state(st->pipe, &st->state.setup);
+}
+
+
+/**
+ * Check if a GL format/type combination is a match to the given pipe format.
+ * XXX probably move this to a re-usable place.
+ */
+static GLboolean
+compatible_formats(GLenum format, GLenum type, GLuint pipeFormat)
+{
+   static const GLuint one = 1;
+   GLubyte littleEndian = *((GLubyte *) one);
+
+   if (pipeFormat == PIPE_FORMAT_U_R8_G8_B8_A8 &&
+       format == GL_RGBA &&
+       type == GL_UNSIGNED_BYTE &&
+       !littleEndian) {
+      return GL_TRUE;
+   }
+   else if (pipeFormat == PIPE_FORMAT_U_R8_G8_B8_A8 &&
+            format == GL_ABGR_EXT &&
+            type == GL_UNSIGNED_BYTE &&
+            littleEndian) {
+      return GL_TRUE;
+   }
+   else if (pipeFormat == PIPE_FORMAT_U_A8_R8_G8_B8 &&
+            format == GL_BGRA &&
+            type == GL_UNSIGNED_BYTE &&
+            littleEndian) {
+      return GL_TRUE;
+   }
+   else if (pipeFormat == PIPE_FORMAT_U_R5_G6_B5 &&
+            format == GL_RGB &&
+            type == GL_UNSIGNED_SHORT_5_6_5) {
+      /* endian don't care */
+      return GL_TRUE;
+   }
+   else if (pipeFormat == PIPE_FORMAT_U_R5_G6_B5 &&
+            format == GL_BGR &&
+            type == GL_UNSIGNED_SHORT_5_6_5_REV) {
+      /* endian don't care */
+      return GL_TRUE;
+   }
+   else if (pipeFormat == PIPE_FORMAT_U_S8 &&
+            format == GL_STENCIL_INDEX &&
+            type == GL_UNSIGNED_BYTE) {
+      return GL_TRUE;
+   }
+   else if (pipeFormat == PIPE_FORMAT_U_Z32 &&
+            format == GL_DEPTH_COMPONENT &&
+            type == GL_UNSIGNED_INT) {
+      return GL_TRUE;
+   }
+   /* XXX add more cases */
+   else {
+      return GL_FALSE;
+   }
+}
+
+
+/**
+ * Check if any per-fragment ops are enabled.
+ * XXX probably move this to a re-usable place.
+ */
+static GLboolean
+any_fragment_ops(const struct st_context *st)
+{
+   if (st->state.alpha_test.enabled ||
+       st->state.blend.blend_enable ||
+       st->state.blend.logicop_enable ||
+       st->state.depth.enabled)
+      /* XXX more checks */
+      return GL_TRUE;
+   else
+      return GL_FALSE;
+}
+
+
+/**
+ * Check if any pixel transfer ops are enabled.
+ * XXX probably move this to a re-usable place.
+ */
+static GLboolean
+any_pixel_transfer_ops(const struct st_context *st)
+{
+   if (st->ctx->Pixel.RedScale != 1.0 ||
+       st->ctx->Pixel.RedBias != 0.0 ||
+       st->ctx->Pixel.GreenScale != 1.0 ||
+       st->ctx->Pixel.GreenBias != 0.0 ||
+       st->ctx->Pixel.BlueScale != 1.0 ||
+       st->ctx->Pixel.BlueBias != 0.0 ||
+       st->ctx->Pixel.AlphaScale != 1.0 ||
+       st->ctx->Pixel.AlphaBias != 0.0 ||
+       st->ctx->Pixel.MapColorFlag)
+      /* XXX more checks */
+      return GL_TRUE;
+   else
+      return GL_FALSE;
+}
+
+
+/**
+ * Draw image with a blit, or other non-textured quad method.
+ */
+static void
+draw_blit(struct st_context *st,
+          GLsizei width, GLsizei height,
+          GLenum format, GLenum type, const GLvoid *pixels)
+{
+
+
+}
+
+
+/**
+ * Called via ctx->Driver.DrawPixels()
+ */
+static void
+st_drawpixels(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height,
+              GLenum format, GLenum type,
+              const struct gl_pixelstore_attrib *unpack, const GLvoid *pixels)
+{
+   struct st_context *st = ctx->st;
+   struct pipe_surface *ps;
+   GLuint bufferFormat;
+
+   if (format == GL_DEPTH_COMPONENT) {
+      ps = st->state.framebuffer.zbuf;
+   }
+   else if (format == GL_STENCIL_INDEX) {
+      ps = st->state.framebuffer.sbuf;
+   }
+   else {
+      ps = st->state.framebuffer.cbufs[0];
+   }
+
+   bufferFormat = ps->format;
+
+   if (any_fragment_ops(st) ||
+       any_pixel_transfer_ops(st) ||
+       !compatible_formats(format, type, ps->format)) {
+      /* textured quad */
+      draw_textured_quad(st, x, y, ctx->Current.RasterPos[2], width, height,
+                         format, type, unpack, pixels);
+   }
+   else {
+      /* blit */
+      draw_blit(st, width, height, format, type, pixels);
+   }
+}
+
+
+void st_init_cb_drawpixels( struct st_context *st )
+{
+   struct dd_function_table *functions = &st->ctx->Driver;
+
+   functions->DrawPixels = st_drawpixels;
+}
+
+
+void st_destroy_cb_drawpixels( struct st_context *st )
+{
+}
diff --git a/src/mesa/state_tracker/st_cb_drawpixels.h b/src/mesa/state_tracker/st_cb_drawpixels.h
new file mode 100644
index 0000000000..8c36aaa931
--- /dev/null
+++ b/src/mesa/state_tracker/st_cb_drawpixels.h
@@ -0,0 +1,38 @@
+/**************************************************************************
+ * 
+ * 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_CB_DRAWPIXELS_H
+#define ST_CB_DRAWPIXELS_H
+
+
+void st_init_cb_drawpixels( struct st_context *st );
+
+void st_destroy_cb_drawpixels( struct st_context *st );
+
+
+#endif /* ST_CB_DRAWPIXELS_H */