diff options
Diffstat (limited to 'src/mesa/program')
| -rw-r--r-- | src/mesa/program/prog_statevars.c | 22 | ||||
| -rw-r--r-- | src/mesa/program/prog_statevars.h | 1 |
2 files changed, 23 insertions, 0 deletions
diff --git a/src/mesa/program/prog_statevars.c b/src/mesa/program/prog_statevars.c index baac29ff0dd..83bd3727f33 100644 --- a/src/mesa/program/prog_statevars.c +++ b/src/mesa/program/prog_statevars.c @@ -572,6 +572,24 @@ _mesa_fetch_state(struct gl_context *ctx, const gl_state_index state[], value[3] = 0.0F; return; + case STATE_FB_WPOS_Y_TRANSFORM: + /* A driver may negate this conditional by using ZW swizzle + * instead of XY (based on e.g. some other state). */ + if (ctx->DrawBuffer->Name != 0) { + /* Identity (XY) followed by flipping Y upside down (ZW). */ + value[0] = 1.0F; + value[1] = 0.0F; + value[2] = -1.0F; + value[3] = (GLfloat) (ctx->DrawBuffer->Height - 1); + } else { + /* Flipping Y upside down (XY) followed by identity (ZW). */ + value[0] = -1.0F; + value[1] = (GLfloat) (ctx->DrawBuffer->Height - 1); + value[2] = 1.0F; + value[3] = 0.0F; + } + return; + case STATE_ROT_MATRIX_0: { const int unit = (int) state[2]; @@ -695,6 +713,7 @@ _mesa_program_state_flags(const gl_state_index state[STATE_LENGTH]) return _NEW_PIXEL; case STATE_FB_SIZE: + case STATE_FB_WPOS_Y_TRANSFORM: return _NEW_BUFFERS; default: @@ -900,6 +919,9 @@ append_token(char *dst, gl_state_index k) case STATE_FB_SIZE: append(dst, "FbSize"); break; + case STATE_FB_WPOS_Y_TRANSFORM: + append(dst, "FbWposYTransform"); + break; case STATE_ROT_MATRIX_0: append(dst, "rotMatrixRow0"); break; diff --git a/src/mesa/program/prog_statevars.h b/src/mesa/program/prog_statevars.h index 6e5be53630c..009ebde0012 100644 --- a/src/mesa/program/prog_statevars.h +++ b/src/mesa/program/prog_statevars.h @@ -117,6 +117,7 @@ typedef enum gl_state_index_ { STATE_PT_BIAS, /**< Pixel transfer RGBA bias */ STATE_SHADOW_AMBIENT, /**< ARB_shadow_ambient fail value; token[2] is texture unit index */ STATE_FB_SIZE, /**< (width-1, height-1, 0, 0) */ + STATE_FB_WPOS_Y_TRANSFORM, /**< (1, 0, -1, height-1) if a FBO is bound, (-1, height-1, 1, 0) otherwise */ STATE_ROT_MATRIX_0, /**< ATI_envmap_bumpmap, rot matrix row 0 */ STATE_ROT_MATRIX_1, /**< ATI_envmap_bumpmap, rot matrix row 1 */ STATE_INTERNAL_DRIVER /* first available state index for drivers (must be last) */ |