/*
* Mesa 3-D graphics library
- * Version: 6.5.3
*
* Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
*
* 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
- * BRIAN PAUL 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.
+ * 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.
*/
/**
* \file swrast/s_context.h
* \brief Software rasterization context and private types.
- * \author Keith Whitwell <keith@tungstengraphics.com>
+ * \author Keith Whitwell <keithw@vmware.com>
*/
/**
#define S_CONTEXT_H
#include "main/mtypes.h"
-#include "shader/prog_execute.h"
+#include "main/texcompress.h"
+#include "program/prog_execute.h"
#include "swrast.h"
+#include "s_fragprog.h"
#include "s_span.h"
+#include "util/rounding.h"
-typedef void (*texture_sample_func)(GLcontext *ctx,
+typedef void (*texture_sample_func)(struct gl_context *ctx,
+ const struct gl_sampler_object *samp,
const struct gl_texture_object *tObj,
GLuint n, const GLfloat texcoords[][4],
- const GLfloat lambda[], GLchan rgba[][4]);
+ const GLfloat lambda[], GLfloat rgba[][4]);
-typedef void (_ASMAPIP blend_func)( GLcontext *ctx, GLuint n,
- const GLubyte mask[],
- GLvoid *src, const GLvoid *dst,
- GLenum chanType);
+typedef void (*swrast_blend_func)(struct gl_context *ctx, GLuint n,
+ const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst,
+ GLenum chanType);
-typedef void (*swrast_point_func)( GLcontext *ctx, const SWvertex *);
+typedef void (*swrast_point_func)( struct gl_context *ctx, const SWvertex *);
-typedef void (*swrast_line_func)( GLcontext *ctx,
+typedef void (*swrast_line_func)( struct gl_context *ctx,
const SWvertex *, const SWvertex *);
-typedef void (*swrast_tri_func)( GLcontext *ctx, const SWvertex *,
+typedef void (*swrast_tri_func)( struct gl_context *ctx, const SWvertex *,
const SWvertex *, const SWvertex *);
-typedef void (*validate_texture_image_func)(GLcontext *ctx,
+typedef void (*validate_texture_image_func)(struct gl_context *ctx,
struct gl_texture_object *texObj,
GLuint face, GLuint level);
_NEW_DEPTH)
+struct swrast_texture_image;
+
+
+/**
+ * Fetch a texel from texture image at given position.
+ */
+typedef void (*FetchTexelFunc)(const struct swrast_texture_image *texImage,
+ GLint col, GLint row, GLint img,
+ GLfloat *texelOut);
+
+
+/**
+ * Subclass of gl_texture_image.
+ * We need extra fields/info to keep tracking of mapped texture buffers,
+ * strides and Fetch functions.
+ */
+struct swrast_texture_image
+{
+ struct gl_texture_image Base;
+
+ GLboolean _IsPowerOfTwo; /**< Are all dimensions powers of two? */
+
+ /** used for mipmap LOD computation */
+ GLfloat WidthScale, HeightScale, DepthScale;
+
+ /**
+ * Byte stride between rows in ImageSlices.
+ *
+ * For compressed textures, this is the byte stride between one row of
+ * blocks and the next row of blocks.
+ *
+ * Only valid while one of the ImageSlices is mapped, and must be the same
+ * between all slices.
+ */
+ GLint RowStride;
+ /**
+ * When a texture image is mapped for swrast, this array contains pointers
+ * to the beginning of each slice.
+ *
+ * For swrast-allocated textures, these pointers will always stay
+ * initialized to point within Buffer.
+ */
+ void **ImageSlices;
+
+ /** Malloc'd texture memory */
+ GLubyte *Buffer;
+
+ FetchTexelFunc FetchTexel;
+
+ /** For fetching texels from compressed textures */
+ compressed_fetch_func FetchCompressedTexel;
+};
+
+
+/** cast wrapper */
+static inline struct swrast_texture_image *
+swrast_texture_image(struct gl_texture_image *img)
+{
+ return (struct swrast_texture_image *) img;
+}
+
+/** cast wrapper */
+static inline const struct swrast_texture_image *
+swrast_texture_image_const(const struct gl_texture_image *img)
+{
+ return (const struct swrast_texture_image *) img;
+}
+
+
+/**
+ * Subclass of gl_renderbuffer with extra fields needed for software
+ * rendering.
+ */
+struct swrast_renderbuffer
+{
+ struct gl_renderbuffer Base;
+
+ GLubyte *Buffer; /**< The malloc'd memory for buffer */
+
+ /** These fields are only valid while buffer is mapped for rendering */
+ GLubyte *Map;
+ GLint RowStride; /**< in bytes */
+
+ /** For span rendering */
+ GLenum ColorType;
+};
+
+
+/** cast wrapper */
+static inline struct swrast_renderbuffer *
+swrast_renderbuffer(struct gl_renderbuffer *img)
+{
+ return (struct swrast_renderbuffer *) img;
+}
+
+
+
/**
* \struct SWcontext
* \brief Per-context state that's private to the software rasterizer module.
GLfloat _BackfaceSign; /** +1 or -1 */
GLfloat _BackfaceCullSign; /** +1, 0, or -1 */
GLboolean _PreferPixelFog; /* Compute fog blend factor per fragment? */
- GLboolean _AnyTextureCombine;
+ GLboolean _TextureCombinePrimary;
GLboolean _FogEnabled;
GLboolean _DeferredTexture;
- GLenum _FogMode; /* either GL_FOG_MODE or fragment program's fog mode */
/** List/array of the fragment attributes to interpolate */
- GLuint _ActiveAttribs[FRAG_ATTRIB_MAX];
- /** Same info, but as a bitmask */
- GLbitfield _ActiveAttribMask;
+ GLuint _ActiveAttribs[VARYING_SLOT_MAX];
+ /** Same info, but as a bitmask of VARYING_BIT_x bits */
+ GLbitfield64 _ActiveAttribMask;
/** Number of fragment attributes to interpolate */
GLuint _NumActiveAttribs;
/** Indicates how each attrib is to be interpolated (lines/tris) */
- GLenum _InterpMode[FRAG_ATTRIB_MAX]; /* GL_FLAT or GL_SMOOTH (for now) */
-
- /* Accum buffer temporaries.
- */
- GLboolean _IntegerAccumMode; /**< Storing unscaled integers? */
- GLfloat _IntegerAccumScaler; /**< Implicit scale factor */
+ GLenum _InterpMode[VARYING_SLOT_MAX]; /* GL_FLAT or GL_SMOOTH (for now) */
/* Working values:
*/
GLbitfield NewState;
GLuint StateChanges;
GLenum Primitive; /* current primitive being drawn (ala glBegin) */
+ GLboolean SpecularVertexAdd; /**< Add specular/secondary color per vertex */
- void (*InvalidateState)( GLcontext *ctx, GLbitfield new_state );
+ void (*InvalidateState)( struct gl_context *ctx, GLbitfield new_state );
/**
* When the NewState mask intersects these masks, we invalidate the
* Will be called when the GL state change mask intersects the above masks.
*/
/*@{*/
- void (*choose_point)( GLcontext * );
- void (*choose_line)( GLcontext * );
- void (*choose_triangle)( GLcontext * );
+ void (*choose_point)( struct gl_context * );
+ void (*choose_line)( struct gl_context * );
+ void (*choose_triangle)( struct gl_context * );
/*@}*/
/**
/** Internal hooks, kept up to date by the same mechanism as above.
*/
- blend_func BlendFunc;
- texture_sample_func TextureSample[MAX_TEXTURE_IMAGE_UNITS];
+ swrast_blend_func BlendFunc;
+ texture_sample_func TextureSample[MAX_COMBINED_TEXTURE_IMAGE_UNITS];
/** Buffer for saving the sampled texture colors.
* Needed for GL_ARB_texture_env_crossbar implementation.
*/
- GLchan *TexelBuffer;
+ GLfloat *TexelBuffer;
validate_texture_image_func ValidateTextureImage;
/** State used during execution of fragment programs */
struct gl_program_machine FragProgMachine;
+ /** Temporary arrays for stencil operations. To avoid large stack
+ * allocations.
+ */
+ struct {
+ GLubyte *buf1, *buf2, *buf3, *buf4;
+ } stencil_temp;
+
} SWcontext;
extern void
-_swrast_validate_derived( GLcontext *ctx );
+_swrast_validate_derived( struct gl_context *ctx );
extern void
-_swrast_update_texture_samplers(GLcontext *ctx);
+_swrast_update_texture_samplers(struct gl_context *ctx);
-#define SWRAST_CONTEXT(ctx) ((SWcontext *)ctx->swrast_context)
+/** Return SWcontext for the given struct gl_context */
+static inline SWcontext *
+SWRAST_CONTEXT(struct gl_context *ctx)
+{
+ return (SWcontext *) ctx->swrast_context;
+}
-#define RENDER_START(SWctx, GLctx) \
- do { \
- if ((SWctx)->Driver.SpanRenderStart) { \
- (*(SWctx)->Driver.SpanRenderStart)(GLctx); \
- } \
- } while (0)
+/** const version of above */
+static inline const SWcontext *
+CONST_SWRAST_CONTEXT(const struct gl_context *ctx)
+{
+ return (const SWcontext *) ctx->swrast_context;
+}
-#define RENDER_FINISH(SWctx, GLctx) \
- do { \
- if ((SWctx)->Driver.SpanRenderFinish) { \
- (*(SWctx)->Driver.SpanRenderFinish)(GLctx); \
- } \
- } while (0)
+/**
+ * Called prior to framebuffer reading/writing.
+ * For drivers that rely on swrast for fallback rendering, this is the
+ * driver's opportunity to map renderbuffers and textures.
+ */
+static inline void
+swrast_render_start(struct gl_context *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ if (swrast->Driver.SpanRenderStart)
+ swrast->Driver.SpanRenderStart(ctx);
+}
+
+
+/** Called after framebuffer reading/writing */
+static inline void
+swrast_render_finish(struct gl_context *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ if (swrast->Driver.SpanRenderFinish)
+ swrast->Driver.SpanRenderFinish(ctx);
+}
+
+
+extern void
+_swrast_span_render_start(struct gl_context *ctx);
+
+extern void
+_swrast_span_render_finish(struct gl_context *ctx);
+
+extern void
+_swrast_map_textures(struct gl_context *ctx);
+
+extern void
+_swrast_unmap_textures(struct gl_context *ctx);
+
+extern unsigned int
+_swrast_teximage_slice_height(struct gl_texture_image *texImage);
+
+extern void
+_swrast_map_texture(struct gl_context *ctx, struct gl_texture_object *texObj);
+
+extern void
+_swrast_unmap_texture(struct gl_context *ctx, struct gl_texture_object *texObj);
+
+
+extern void
+_swrast_map_renderbuffers(struct gl_context *ctx);
+
+extern void
+_swrast_unmap_renderbuffers(struct gl_context *ctx);
/**
+/*
+ * Fixed point arithmetic macros
+ */
+#ifndef FIXED_FRAC_BITS
+#define FIXED_FRAC_BITS 11
+#endif
+
+#define FIXED_SHIFT FIXED_FRAC_BITS
+#define FIXED_ONE (1 << FIXED_SHIFT)
+#define FIXED_HALF (1 << (FIXED_SHIFT-1))
+#define FIXED_FRAC_MASK (FIXED_ONE - 1)
+#define FIXED_INT_MASK (~FIXED_FRAC_MASK)
+#define FIXED_EPSILON 1
+#define FIXED_SCALE ((float) FIXED_ONE)
+#define FIXED_DBL_SCALE ((double) FIXED_ONE)
+#define FloatToFixed(X) (lroundf((X) * FIXED_SCALE))
+#define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))
+#define IntToFixed(I) ((I) << FIXED_SHIFT)
+#define FixedToInt(X) ((X) >> FIXED_SHIFT)
+#define FixedToUns(X) (((unsigned int)(X)) >> FIXED_SHIFT)
+#define FixedCeil(X) (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
+#define FixedFloor(X) ((X) & FIXED_INT_MASK)
+#define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
+#define PosFloatToFixed(X) FloatToFixed(X)
+#define SignedFloatToFixed(X) FloatToFixed(X)
+
+
+
/*
* XXX these macros are just bandages for now in order to make
* CHAN_BITS==32 compile cleanly.
#define ATTRIB_LOOP_END } }
+/**
+ * Return the address of a pixel value in a mapped renderbuffer.
+ */
+static inline GLubyte *
+_swrast_pixel_address(struct gl_renderbuffer *rb, GLint x, GLint y)
+{
+ struct swrast_renderbuffer *srb = swrast_renderbuffer(rb);
+ const GLint bpp = _mesa_get_format_bytes(rb->Format);
+ const GLint rowStride = srb->RowStride;
+ assert(x >= 0);
+ assert(y >= 0);
+ /* NOTE: using <= only because of s_tritemp.h which gets a pixel
+ * address but doesn't necessarily access it.
+ */
+ assert(x <= (GLint) rb->Width);
+ assert(y <= (GLint) rb->Height);
+ assert(srb->Map);
+ return (GLubyte *) srb->Map + y * rowStride + x * bpp;
+}
+
+
#endif
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