diff options
| -rw-r--r-- | src/mesa/drivers/common/meta.c | 171 | ||||
| -rw-r--r-- | src/mesa/drivers/common/meta.h | 7 |
2 files changed, 175 insertions, 3 deletions
diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c index 965fb8697e..ecf440c9ad 100644 --- a/src/mesa/drivers/common/meta.c +++ b/src/mesa/drivers/common/meta.c @@ -182,6 +182,16 @@ struct drawpix_state /** + * State for glBitmap() + */ +struct bitmap_state +{ + GLuint ArrayObj; + GLuint VBO; +}; + + +/** * Temporary texture used for glBlitFramebuffer, glDrawPixels, etc. * This is currently shared by all the meta ops. But we could create a * separate one for each of glDrawPixel, glBlitFramebuffer, glCopyPixels, etc. @@ -211,9 +221,9 @@ struct gl_meta_state struct clear_state Clear; /**< For _mesa_meta_clear() */ struct copypix_state CopyPix; /**< For _mesa_meta_copy_pixels() */ struct drawpix_state DrawPix; /**< For _mesa_meta_draw_pixels() */ + struct bitmap_state Bitmap; /**< For _mesa_meta_bitmap() */ /* other possible meta-ops: - * glBitmap() * glGenerateMipmap() */ }; @@ -382,6 +392,11 @@ _mesa_meta_begin(GLcontext *ctx, GLbitfield state) save->ClientActiveUnit = ctx->Array.ActiveTexture; save->EnvMode = ctx->Texture.Unit[0].EnvMode; + if (ctx->Texture._EnabledUnits | + ctx->Texture._EnabledCoordUnits | + ctx->Texture._TexGenEnabled | + ctx->Texture._TexMatEnabled) { + /* Disable all texture units */ for (u = 0; u < ctx->Const.MaxTextureUnits; u++) { save->TexEnabled[u] = ctx->Texture.Unit[u].Enabled; @@ -400,6 +415,7 @@ _mesa_meta_begin(GLcontext *ctx, GLbitfield state) _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, GL_FALSE); } } + } /* save current texture objects for unit[0] only */ for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) { @@ -754,8 +770,8 @@ alloc_texture(struct temp_texture *tex, if (tex->NPOT) { /* use non-power of two size */ - tex->Width = width; - tex->Height = height; + tex->Width = MIN2(64, width); + tex->Height = MIN2(64, height); } else { /* find power of two size */ @@ -1636,3 +1652,152 @@ _mesa_meta_draw_pixels(GLcontext *ctx, _mesa_meta_end(ctx); } + + +/** + * Do glBitmap with a alpha texture quad. Use the alpha test to + * cull the 'off' bits. If alpha test is already enabled, fall back + * to swrast (should be a rare case). + * A bitmap cache as in the gallium/mesa state tracker would + * improve performance a lot. + */ +void +_mesa_meta_bitmap(GLcontext *ctx, + GLint x, GLint y, GLsizei width, GLsizei height, + const struct gl_pixelstore_attrib *unpack, + const GLubyte *bitmap1) +{ + struct bitmap_state *bitmap = &ctx->Meta->Bitmap; + struct temp_texture *tex = get_temp_texture(ctx); + const GLenum texIntFormat = GL_ALPHA; + const struct gl_pixelstore_attrib unpackSave = *unpack; + GLfloat verts[4][9]; /* four verts of X,Y,Z,S,T,R,G,B,A */ + GLboolean newTex; + GLubyte *bitmap8; + + /* + * Check if swrast fallback is needed. + */ + if (ctx->_ImageTransferState || + ctx->Color.AlphaEnabled || + ctx->Fog.Enabled || + ctx->Texture._EnabledUnits || + width > tex->MaxSize || + height > tex->MaxSize) { + _swrast_Bitmap(ctx, x, y, width, height, unpack, bitmap1); + return; + } + + /* Most GL state applies to glBitmap (like blending, stencil, etc), + * but a there's a few things we need to override: + */ + _mesa_meta_begin(ctx, (META_ALPHA_TEST | + META_PIXEL_STORE | + META_RASTERIZATION | + META_SHADER | + META_TEXTURE | + META_TRANSFORM | + META_VERTEX | + META_VIEWPORT)); + + if (bitmap->ArrayObj == 0) { + /* one-time setup */ + + /* create vertex array object */ + _mesa_GenVertexArraysAPPLE(1, &bitmap->ArrayObj); + _mesa_BindVertexArrayAPPLE(bitmap->ArrayObj); + + /* create vertex array buffer */ + _mesa_GenBuffersARB(1, &bitmap->VBO); + _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, bitmap->VBO); + _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts), + NULL, GL_DYNAMIC_DRAW_ARB); + + /* setup vertex arrays */ + _mesa_VertexPointer(3, GL_FLOAT, sizeof(verts[0]), + (void *) (0 * sizeof(GLfloat))); + _mesa_TexCoordPointer(2, GL_FLOAT, sizeof(verts[0]), + (void *) (3 * sizeof(GLfloat))); + _mesa_ColorPointer(4, GL_FLOAT, sizeof(verts[0]), + (void *) (5 * sizeof(GLfloat))); + + _mesa_EnableClientState(GL_VERTEX_ARRAY); + _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY); + _mesa_EnableClientState(GL_COLOR_ARRAY); + } + else { + _mesa_BindVertexArray(bitmap->ArrayObj); + _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, bitmap->VBO); + } + + newTex = alloc_texture(tex, width, height, texIntFormat); + + /* vertex positions, texcoords, colors (after texture allocation!) */ + { + const GLfloat x0 = (GLfloat) x; + const GLfloat y0 = (GLfloat) y; + const GLfloat x1 = (GLfloat) (x + width); + const GLfloat y1 = (GLfloat) (y + height); + const GLfloat z = ctx->Current.RasterPos[2]; + GLuint i; + + verts[0][0] = x0; + verts[0][1] = y0; + verts[0][2] = z; + verts[0][3] = 0.0F; + verts[0][4] = 0.0F; + verts[1][0] = x1; + verts[1][1] = y0; + verts[1][2] = z; + verts[1][3] = tex->Sright; + verts[1][4] = 0.0F; + verts[2][0] = x1; + verts[2][1] = y1; + verts[2][2] = z; + verts[2][3] = tex->Sright; + verts[2][4] = tex->Ttop; + verts[3][0] = x0; + verts[3][1] = y1; + verts[3][2] = z; + verts[3][3] = 0.0F; + verts[3][4] = tex->Ttop; + + for (i = 0; i < 4; i++) { + verts[i][5] = ctx->Current.RasterColor[0]; + verts[i][6] = ctx->Current.RasterColor[1]; + verts[i][7] = ctx->Current.RasterColor[2]; + verts[i][8] = ctx->Current.RasterColor[3]; + } + + /* upload new vertex data */ + _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts); + } + + bitmap1 = _mesa_map_pbo_source(ctx, &unpackSave, bitmap1); + if (!bitmap1) + return; + + bitmap8 = (GLubyte *) _mesa_calloc(width * height); + if (bitmap8) { + _mesa_expand_bitmap(width, height, &unpackSave, bitmap1, + bitmap8, width, 0xff); + + _mesa_set_enable(ctx, tex->Target, GL_TRUE); + + _mesa_set_enable(ctx, GL_ALPHA_TEST, GL_TRUE); + _mesa_AlphaFunc(GL_GREATER, 0.0); + + setup_drawpix_texture(tex, newTex, texIntFormat, width, height, + GL_ALPHA, GL_UNSIGNED_BYTE, bitmap8); + + _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4); + + _mesa_set_enable(ctx, tex->Target, GL_FALSE); + + _mesa_free(bitmap8); + } + + _mesa_unmap_pbo_source(ctx, &unpackSave); + + _mesa_meta_end(ctx); +} diff --git a/src/mesa/drivers/common/meta.h b/src/mesa/drivers/common/meta.h index b03b64c48a..b729208492 100644 --- a/src/mesa/drivers/common/meta.h +++ b/src/mesa/drivers/common/meta.h @@ -77,5 +77,12 @@ _mesa_meta_draw_pixels(GLcontext *ctx, const struct gl_pixelstore_attrib *unpack, const GLvoid *pixels); +extern void +_mesa_meta_bitmap(GLcontext *ctx, + GLint x, GLint y, GLsizei width, GLsizei height, + const struct gl_pixelstore_attrib *unpack, + const GLubyte *bitmap); + + #endif /* META_H */ |