diff options
Diffstat (limited to 'src/mesa/drivers/dri/intel/intel_pixel_bitmap.c')
| -rw-r--r-- | src/mesa/drivers/dri/intel/intel_pixel_bitmap.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/intel/intel_pixel_bitmap.c b/src/mesa/drivers/dri/intel/intel_pixel_bitmap.c index 5e0e0d29ca..1d7f15f10a 100644 --- a/src/mesa/drivers/dri/intel/intel_pixel_bitmap.c +++ b/src/mesa/drivers/dri/intel/intel_pixel_bitmap.c @@ -32,7 +32,18 @@ #include "main/mtypes.h" #include "main/macros.h" #include "main/bufferobj.h" +#include "main/pixelstore.h" #include "main/state.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 "shader/arbprogram.h" +#include "glapi/dispatch.h" #include "swrast/swrast.h" #include "intel_screen.h" @@ -87,6 +98,11 @@ static GLboolean test_bit( const GLubyte *src, return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0; } +static GLboolean test_msb_bit(const GLubyte *src, GLuint bit) +{ + return (src[bit/8] & (1<<(7 - (bit % 8)))) ? 1 : 0; +} + static void set_bit( GLubyte *dest, GLuint bit ) { @@ -317,9 +333,174 @@ out: return GL_TRUE; } +static GLboolean +intel_texture_bitmap(GLcontext * ctx, + GLint dst_x, GLint dst_y, + GLsizei width, GLsizei height, + const struct gl_pixelstore_attrib *unpack, + const GLubyte *bitmap) +{ + struct intel_context *intel = intel_context(ctx); + static const char *fp = + "!!ARBfp1.0\n" + "TEMP val;\n" + "PARAM color=program.local[0];\n" + "TEX val, fragment.texcoord[0], texture[0], 2D;\n" + "ADD val, val.wwww, {-.5, -.5, -.5, -.5};\n" + "KIL val;\n" + "MOV result.color, color;\n" + "END\n"; + GLuint texname; + GLfloat vertices[4][4]; + GLfloat texcoords[4][2]; + GLint old_active_texture; + GLubyte *unpacked_bitmap; + GLubyte *a8_bitmap; + int x, y; + + /* We need a fragment program for the KIL effect */ + if (!ctx->Extensions.ARB_fragment_program || + !ctx->Extensions.ARB_vertex_program) { + if (INTEL_DEBUG & DEBUG_FALLBACKS) + fprintf(stderr, + "glBitmap fallback: No fragment/vertex program support\n"); + return GL_FALSE; + } + + /* We're going to mess with texturing with no regard to existing texture + * state, so if there is some set up we have to bail. + */ + if (ctx->Texture._EnabledUnits != 0) { + if (INTEL_DEBUG & DEBUG_FALLBACKS) + fprintf(stderr, "glBitmap fallback: texturing enabled\n"); + return GL_FALSE; + } + + /* Can't do textured DrawPixels with a fragment program, unless we were + * to generate a new program that sampled our texture and put the results + * in the fragment color before the user's program started. + */ + if (ctx->FragmentProgram.Enabled) { + if (INTEL_DEBUG & DEBUG_FALLBACKS) + fprintf(stderr, "glBitmap fallback: fragment program enabled\n"); + return GL_FALSE; + } + + if (ctx->VertexProgram.Enabled) { + if (INTEL_DEBUG & DEBUG_FALLBACKS) + fprintf(stderr, "glBitmap fallback: vertex program enabled\n"); + return GL_FALSE; + } + + /* Check that we can load in a texture this big. */ + if (width > (1 << (ctx->Const.MaxTextureLevels - 1)) || + height > (1 << (ctx->Const.MaxTextureLevels - 1))) { + if (INTEL_DEBUG & DEBUG_FALLBACKS) + fprintf(stderr, "glBitmap fallback: bitmap too large (%dx%d)\n", + width, height); + return GL_FALSE; + } + /* Convert the A1 bitmap to an A8 format suitable for glTexImage */ + if (unpack->BufferObj->Name) { + bitmap = map_pbo(ctx, width, height, unpack, bitmap); + if (bitmap == NULL) + return GL_TRUE; /* even though this is an error, we're done */ + } + unpacked_bitmap = _mesa_unpack_bitmap(width, height, bitmap, + unpack); + a8_bitmap = _mesa_calloc(width * height); + for (y = 0; y < height; y++) { + for (x = 0; x < width; x++) { + if (test_msb_bit(unpacked_bitmap, ALIGN(width, 8) * y + x)) + a8_bitmap[y * width + x] = 0xff; + } + } + _mesa_free(unpacked_bitmap); + if (unpack->BufferObj->Name) { + /* done with PBO so unmap it now */ + ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT, + unpack->BufferObj); + } + /* Save GL state before we start setting up our drawing */ + _mesa_PushAttrib(GL_ENABLE_BIT | GL_CURRENT_BIT | + GL_VIEWPORT_BIT); + _mesa_PushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT | + GL_CLIENT_PIXEL_STORE_BIT); + old_active_texture = ctx->Texture.CurrentUnit; + + _mesa_Disable(GL_POLYGON_STIPPLE); + + /* Upload our bitmap data to an alpha texture */ + _mesa_ActiveTextureARB(GL_TEXTURE0_ARB); + _mesa_Enable(GL_TEXTURE_2D); + _mesa_GenTextures(1, &texname); + _mesa_BindTexture(GL_TEXTURE_2D, texname); + _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + + _mesa_PixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE); + _mesa_PixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE); + _mesa_PixelStorei(GL_UNPACK_ROW_LENGTH, 0); + _mesa_PixelStorei(GL_UNPACK_SKIP_PIXELS, 0); + _mesa_PixelStorei(GL_UNPACK_SKIP_ROWS, 0); + _mesa_PixelStorei(GL_UNPACK_ALIGNMENT, 1); + _mesa_TexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0, + GL_ALPHA, GL_UNSIGNED_BYTE, a8_bitmap); + _mesa_free(a8_bitmap); + + intel_meta_set_fragment_program(intel, &intel->meta.bitmap_fp, fp); + _mesa_ProgramLocalParameter4fvARB(GL_FRAGMENT_PROGRAM_ARB, 0, + ctx->Current.RasterColor); + intel_meta_set_passthrough_vertex_program(intel); + intel_meta_set_passthrough_transform(intel); + + vertices[0][0] = dst_x; + vertices[0][1] = dst_y; + vertices[0][2] = ctx->Current.RasterPos[2]; + vertices[0][3] = 1.0; + vertices[1][0] = dst_x + width; + vertices[1][1] = dst_y; + vertices[1][2] = ctx->Current.RasterPos[2]; + vertices[1][3] = 1.0; + vertices[2][0] = dst_x + width; + vertices[2][1] = dst_y + height; + vertices[2][2] = ctx->Current.RasterPos[2]; + vertices[2][3] = 1.0; + vertices[3][0] = dst_x; + vertices[3][1] = dst_y + height; + vertices[3][2] = ctx->Current.RasterPos[2]; + vertices[3][3] = 1.0; + + texcoords[0][0] = 0.0; + texcoords[0][1] = 0.0; + texcoords[1][0] = 1.0; + texcoords[1][1] = 0.0; + texcoords[2][0] = 1.0; + texcoords[2][1] = 1.0; + texcoords[3][0] = 0.0; + texcoords[3][1] = 1.0; + + _mesa_VertexPointer(4, GL_FLOAT, 4 * sizeof(GLfloat), &vertices); + _mesa_TexCoordPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), &texcoords); + _mesa_Enable(GL_VERTEX_ARRAY); + _mesa_Enable(GL_TEXTURE_COORD_ARRAY); + CALL_DrawArrays(ctx->Exec, (GL_TRIANGLE_FAN, 0, 4)); + + intel_meta_restore_transform(intel); + intel_meta_restore_fragment_program(intel); + intel_meta_restore_vertex_program(intel); + + _mesa_PopClientAttrib(); + _mesa_Disable(GL_TEXTURE_2D); /* asserted that it was disabled at entry */ + _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + old_active_texture); + _mesa_PopAttrib(); + + _mesa_DeleteTextures(1, &texname); + return GL_TRUE; +} /* There are a large number of possible ways to implement bitmap on * this hardware, most of them have some sort of drawback. Here are a @@ -352,6 +533,10 @@ intelBitmap(GLcontext * ctx, unpack, pixels)) return; + if (intel_texture_bitmap(ctx, x, y, width, height, + unpack, pixels)) + return; + if (INTEL_DEBUG & DEBUG_PIXEL) _mesa_printf("%s: fallback to swrast\n", __FUNCTION__); |