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Diffstat (limited to 'src/mesa/drivers/dri/intel/intel_generatemipmap.c')
-rw-r--r--src/mesa/drivers/dri/intel/intel_generatemipmap.c286
1 files changed, 286 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/intel/intel_generatemipmap.c b/src/mesa/drivers/dri/intel/intel_generatemipmap.c
new file mode 100644
index 0000000000..0052abb42d
--- /dev/null
+++ b/src/mesa/drivers/dri/intel/intel_generatemipmap.c
@@ -0,0 +1,286 @@
+/*
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ * Copyright © 2009 Intel Corporation
+ *
+ * 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, sublicense,
+ * 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 NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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:
+ * Eric Anholt <eric@anholt.net>
+ *
+ */
+
+#include "main/glheader.h"
+#include "main/enums.h"
+#include "main/image.h"
+#include "main/mtypes.h"
+#include "main/macros.h"
+#include "main/bufferobj.h"
+#include "main/teximage.h"
+#include "main/texenv.h"
+#include "main/texobj.h"
+#include "main/texstate.h"
+#include "main/texparam.h"
+#include "main/varray.h"
+#include "main/attrib.h"
+#include "main/enable.h"
+#include "main/buffers.h"
+#include "main/fbobject.h"
+#include "main/framebuffer.h"
+#include "main/renderbuffer.h"
+#include "main/depth.h"
+#include "main/hash.h"
+#include "main/mipmap.h"
+#include "main/blend.h"
+#include "swrast/swrast.h"
+
+#include "intel_screen.h"
+#include "intel_context.h"
+#include "intel_batchbuffer.h"
+#include "intel_pixel.h"
+#include "intel_tex.h"
+#include "intel_mipmap_tree.h"
+
+#if FEATURE_attrib_stack
+static const char *intel_fp_tex2d =
+ "!!ARBfp1.0\n"
+ "TEX result.color, fragment.texcoord[0], texture[0], 2D;\n"
+ "END\n";
+
+static GLboolean
+intel_generate_mipmap_level(GLcontext *ctx, GLuint tex_name,
+ int level, int width, int height)
+{
+ struct intel_context *intel = intel_context(ctx);
+ GLfloat vertices[4][2];
+ GLint status;
+
+ /* Set to source from the previous level */
+ _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, level - 1);
+ _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, level - 1);
+
+ /* Set to draw into the current level */
+ _mesa_FramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
+ GL_COLOR_ATTACHMENT0_EXT,
+ GL_TEXTURE_2D,
+ tex_name,
+ level);
+ /* Choose to render to the color attachment. */
+ _mesa_DrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
+
+ status = _mesa_CheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT);
+ if (status != GL_FRAMEBUFFER_COMPLETE_EXT)
+ return GL_FALSE;
+
+ meta_set_passthrough_transform(&intel->meta);
+
+ /* XXX: Doing it right would involve setting up the transformation to do
+ * 0-1 mapping or something, and not changing the vertex data.
+ */
+ vertices[0][0] = 0;
+ vertices[0][1] = 0;
+ vertices[1][0] = width;
+ vertices[1][1] = 0;
+ vertices[2][0] = width;
+ vertices[2][1] = height;
+ vertices[3][0] = 0;
+ vertices[3][1] = height;
+
+ _mesa_VertexPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), &vertices);
+ _mesa_Enable(GL_VERTEX_ARRAY);
+ meta_set_default_texrect(&intel->meta);
+
+ _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
+
+ meta_restore_texcoords(&intel->meta);
+ meta_restore_transform(&intel->meta);
+
+ return GL_TRUE;
+}
+
+static GLboolean
+intel_generate_mipmap_2d(GLcontext *ctx,
+ GLenum target,
+ struct gl_texture_object *texObj)
+{
+ struct intel_context *intel = intel_context(ctx);
+ GLint old_active_texture;
+ int level, max_levels, start_level, end_level;
+ GLuint fb_name;
+ GLboolean success = GL_FALSE;
+ struct gl_framebuffer *saved_fbo = NULL;
+
+ _mesa_PushAttrib(GL_ENABLE_BIT | GL_TEXTURE_BIT |
+ GL_CURRENT_BIT | GL_COLOR_BUFFER_BIT |
+ GL_DEPTH_BUFFER_BIT);
+ _mesa_PushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT);
+ old_active_texture = ctx->Texture.CurrentUnit;
+ _mesa_reference_framebuffer(&saved_fbo, ctx->DrawBuffer);
+
+ _mesa_Disable(GL_POLYGON_STIPPLE);
+ _mesa_Disable(GL_DEPTH_TEST);
+ _mesa_Disable(GL_STENCIL_TEST);
+ _mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+ _mesa_DepthMask(GL_FALSE);
+
+ /* Bind the given texture to GL_TEXTURE_2D with linear filtering for our
+ * minification.
+ */
+ _mesa_ActiveTextureARB(GL_TEXTURE0_ARB);
+ _mesa_Enable(GL_TEXTURE_2D);
+ _mesa_BindTexture(GL_TEXTURE_2D, texObj->Name);
+ _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+ GL_LINEAR_MIPMAP_NEAREST);
+ _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+ /* Bind the new renderbuffer to the color attachment point. */
+ _mesa_GenFramebuffersEXT(1, &fb_name);
+ _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb_name);
+
+ meta_set_fragment_program(&intel->meta, &intel->meta.tex2d_fp,
+ intel_fp_tex2d);
+ meta_set_passthrough_vertex_program(&intel->meta);
+
+ max_levels = _mesa_max_texture_levels(ctx, texObj->Target);
+ start_level = texObj->BaseLevel;
+ end_level = texObj->MaxLevel;
+
+ /* Loop generating level+1 from level. */
+ for (level = start_level; level < end_level && level < max_levels - 1; level++) {
+ const struct gl_texture_image *srcImage;
+ int width, height;
+
+ srcImage = _mesa_select_tex_image(ctx, texObj, target, level);
+ if (srcImage->Border != 0)
+ goto fail;
+
+ width = srcImage->Width / 2;
+ if (width < 1)
+ width = 1;
+ height = srcImage->Height / 2;
+ if (height < 1)
+ height = 1;
+
+ if (width == srcImage->Width &&
+ height == srcImage->Height) {
+ /* Neither _mesa_max_texture_levels nor texObj->MaxLevel are the
+ * maximum texture level for the object, so break out when we've gone
+ * over the edge.
+ */
+ break;
+ }
+
+ /* Make sure that there's space allocated for the target level.
+ * We could skip this if there's already space allocated and save some
+ * time.
+ */
+ _mesa_TexImage2D(GL_TEXTURE_2D, level + 1, srcImage->InternalFormat,
+ width, height, 0,
+ GL_RGBA, GL_UNSIGNED_INT, NULL);
+
+ if (!intel_generate_mipmap_level(ctx, texObj->Name, level + 1,
+ width, height))
+ goto fail;
+ }
+
+ success = GL_TRUE;
+
+fail:
+ meta_restore_fragment_program(&intel->meta);
+ meta_restore_vertex_program(&intel->meta);
+
+ _mesa_DeleteFramebuffersEXT(1, &fb_name);
+ _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + old_active_texture);
+ if (saved_fbo)
+ _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, saved_fbo->Name);
+ _mesa_reference_framebuffer(&saved_fbo, NULL);
+ _mesa_PopClientAttrib();
+ _mesa_PopAttrib();
+
+ return success;
+}
+#endif /* FEATURE_attrib_stack */
+
+
+/**
+ * Generate new mipmap data from BASE+1 to BASE+p (the minimally-sized mipmap
+ * level).
+ *
+ * The texture object's miptree must be mapped.
+ *
+ * It would be really nice if this was just called by Mesa whenever mipmaps
+ * needed to be regenerated, rather than us having to remember to do so in
+ * each texture image modification path.
+ *
+ * This function should also include an accelerated path.
+ */
+void
+intel_generate_mipmap(GLcontext *ctx, GLenum target,
+ struct gl_texture_object *texObj)
+{
+ struct intel_context *intel = intel_context(ctx);
+ struct intel_texture_object *intelObj = intel_texture_object(texObj);
+ GLuint nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
+ int face, i;
+
+#if FEATURE_attrib_stack
+ /* HW path */
+ if (target == GL_TEXTURE_2D &&
+ ctx->Extensions.EXT_framebuffer_object &&
+ ctx->Extensions.ARB_fragment_program &&
+ ctx->Extensions.ARB_vertex_program) {
+ GLboolean success;
+
+ /* We'll be accessing this texture using GL entrypoints, which should
+ * be resilient against other access to this texture.
+ */
+ _mesa_unlock_texture(ctx, texObj);
+ success = intel_generate_mipmap_2d(ctx, target, texObj);
+ _mesa_lock_texture(ctx, texObj);
+
+ if (success)
+ return;
+ }
+#endif /* FEATURE_attrib_stack */
+
+ /* SW path */
+ intel_tex_map_level_images(intel, intelObj, texObj->BaseLevel);
+ _mesa_generate_mipmap(ctx, target, texObj);
+ intel_tex_unmap_level_images(intel, intelObj, texObj->BaseLevel);
+
+ /* Update the level information in our private data in the new images, since
+ * it didn't get set as part of a normal TexImage path.
+ */
+ for (face = 0; face < nr_faces; face++) {
+ for (i = texObj->BaseLevel + 1; i < texObj->MaxLevel; i++) {
+ struct intel_texture_image *intelImage;
+
+ intelImage = intel_texture_image(texObj->Image[face][i]);
+ if (intelImage == NULL)
+ break;
+
+ intelImage->level = i;
+ intelImage->face = face;
+ /* Unreference the miptree to signal that the new Data is a bare
+ * pointer from mesa.
+ */
+ intel_miptree_release(intel, &intelImage->mt);
+ }
+ }
+}
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