diff options
Diffstat (limited to 'src/mesa/drivers/osmesa/osmesa.c')
| -rw-r--r-- | src/mesa/drivers/osmesa/osmesa.c | 215 |
1 files changed, 212 insertions, 3 deletions
diff --git a/src/mesa/drivers/osmesa/osmesa.c b/src/mesa/drivers/osmesa/osmesa.c index 6cea55f78e..b93683ae2a 100644 --- a/src/mesa/drivers/osmesa/osmesa.c +++ b/src/mesa/drivers/osmesa/osmesa.c @@ -1,4 +1,4 @@ -/* $Id: osmesa.c,v 1.58 2001/06/15 13:41:12 brianp Exp $ */ +/* $Id: osmesa.c,v 1.59 2001/06/27 13:56:17 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -251,6 +251,22 @@ OSMesaCreateContextExt( GLenum format, GLint depthBits, GLint stencilBits, rgbmode = GL_TRUE; swalpha = GL_TRUE; } + else if (format==OSMESA_RGB_565) { + indexBits = 0; + redBits = 5; + greenBits = 6; + blueBits = 5; + alphaBits = 0; + rshift = 11; + gshift = 5; + bshift = 0; + ashift = 0; + rind = 0; /* not used */ + gind = 0; + bind = 0; + rgbmode = GL_TRUE; + swalpha = GL_FALSE; + } else { return NULL; } @@ -377,6 +393,10 @@ static void compute_row_addresses( OSMesaContext ctx ) /* RGB mode */ bytesPerPixel = 3 * sizeof(GLchan); } + else if (ctx->format == OSMESA_RGB_565) { + /* 5/6/5 RGB pixel in 16 bits */ + bytesPerPixel = 2; + } else { /* RGBA mode */ bytesPerPixel = 4 * sizeof(GLchan); @@ -421,7 +441,7 @@ static void compute_row_addresses( OSMesaContext ctx ) * Input: ctx - the rendering context * buffer - the image buffer memory * type - data type for pixel components, only GL_UNSIGNED_BYTE - * supported now + * and GL_UNSIGNED_SHORT_5_6_5 supported now. * width, height - size of image buffer in pixels, at least 1 * Return: GL_TRUE if success, GL_FALSE if error because of invalid ctx, * invalid buffer address, type!=GL_UNSIGNED_BYTE, width<1, height<1, @@ -431,12 +451,19 @@ GLboolean GLAPIENTRY OSMesaMakeCurrent( OSMesaContext ctx, void *buffer, GLenum type, GLsizei width, GLsizei height ) { - if (!ctx || !buffer || type != CHAN_TYPE || + if (!ctx || !buffer || width < 1 || height < 1 || width > MAX_WIDTH || height > MAX_HEIGHT) { return GL_FALSE; } + if (ctx->format == OSMESA_RGB_565 && type != GL_UNSIGNED_SHORT_5_6_5) { + return GL_FALSE; + } + else if (type != CHAN_TYPE) { + return GL_FALSE; + } + osmesa_update_state( &ctx->gl_ctx, 0 ); _mesa_make_current( &ctx->gl_ctx, ctx->gl_buffer ); @@ -619,6 +646,11 @@ do { \ (DST)[2] = R; \ } while (0) +#define PACK_RGB_565(DST, R, G, B) \ +do { \ + (DST) = (((R) << 8) & 0xf800) | (((G) << 3) & 0x7e0) | ((B) >> 3);\ +} while (0) + #define UNPACK_RED(P) ( (P)[osmesa->rInd] ) #define UNPACK_GREEN(P) ( (P)[osmesa->gInd] ) @@ -627,6 +659,7 @@ do { \ #define PIXELADDR1(X,Y) (osmesa->rowaddr[Y] + (X)) +#define PIXELADDR2(X,Y) (osmesa->rowaddr[Y] + 2 * (X)) #define PIXELADDR3(X,Y) (osmesa->rowaddr[Y] + 3 * (X)) #define PIXELADDR4(X,Y) (osmesa->rowaddr[Y] + 4 * (X)) @@ -741,6 +774,34 @@ static void clear( GLcontext *ctx, GLbitfield mask, GLboolean all, } } } + else if (osmesa->format == OSMESA_RGB_565) { + const GLchan r = ctx->Color.ClearColor[0]; + const GLchan g = ctx->Color.ClearColor[1]; + const GLchan b = ctx->Color.ClearColor[2]; + GLushort clearPixel; + PACK_RGB_565(clearPixel, r, g, b); + if (all) { + /* Clear whole RGB buffer */ + const GLint n = osmesa->rowlength * osmesa->height; + GLushort *ptr2 = (GLushort *) osmesa->buffer; + GLuint i; + for (i = 0; i < n; i++) { + *ptr2 = clearPixel; + ptr2++; + } + } + else { + /* clear scissored region */ + GLint i, j; + for (i = 0; i < height; i++) { + GLushort *ptr2 = (GLushort *) PIXELADDR2(x, (y + i)); + for (j = 0; j < width; j++) { + *ptr2 = clearPixel; + ptr2++; + } + } + } + } else { #if CHAN_TYPE == GL_UNSIGNED_BYTE /* 4-byte pixel value */ @@ -1208,6 +1269,145 @@ read_rgba_pixels3( const GLcontext *ctx, /**********************************************************************/ +/***** 2 byte RGB pixel support funcs *****/ +/**********************************************************************/ + +/* Write RGBA pixels to an RGB_565 buffer. */ +static void +write_rgba_span2( const GLcontext *ctx, + GLuint n, GLint x, GLint y, + CONST GLubyte rgba[][4], const GLubyte mask[] ) +{ + OSMesaContext osmesa = OSMESA_CONTEXT(ctx); + GLushort *ptr2 = (GLushort *) PIXELADDR2(x, y); + GLuint i; + if (mask) { + for (i = 0; i < n; i++, ptr2++) { + if (mask[i]) { + PACK_RGB_565(*ptr2, rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]); + } + } + } + else { + for (i = 0; i < n; i++, ptr2++) { + PACK_RGB_565(*ptr2, rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]); + } + } +} + + +/* Write RGB pixels to an RGB_565 buffer. */ +static void +write_rgb_span2( const GLcontext *ctx, + GLuint n, GLint x, GLint y, + CONST GLubyte rgb[][3], const GLubyte mask[] ) +{ + OSMesaContext osmesa = OSMESA_CONTEXT(ctx); + GLushort *ptr2 = (GLushort *) PIXELADDR2(x, y); + GLuint i; + if (mask) { + for (i = 0; i < n; i++, ptr2++) { + if (mask[i]) { + PACK_RGB_565(*ptr2, rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP]); + } + } + } + else { + for (i = 0; i < n; i++, ptr2++) { + PACK_RGB_565(*ptr2, rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP]); + } + } +} + + +static void +write_monocolor_span2( const GLcontext *ctx, GLuint n, GLint x, GLint y, + const GLchan color[4], const GLubyte mask[] ) +{ + OSMesaContext osmesa = OSMESA_CONTEXT(ctx); + GLushort pixel; + GLushort *ptr2 = (GLushort *) PIXELADDR2(x, y); + GLuint i; + PACK_RGB_565(pixel, color[RCOMP], color[GCOMP], color[BCOMP]); + for (i = 0; i < n; i++, ptr2++) { + if (mask[i]) { + *ptr2 = pixel; + } + } +} + + +static void +write_rgba_pixels2( const GLcontext *ctx, + GLuint n, const GLint x[], const GLint y[], + CONST GLubyte rgba[][4], const GLubyte mask[] ) +{ + OSMesaContext osmesa = OSMESA_CONTEXT(ctx); + GLuint i; + for (i = 0; i < n; i++) { + if (mask[i]) { + GLushort *ptr2 = (GLushort *) PIXELADDR2(x[i],y[i]); + PACK_RGB_565(*ptr2, rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]); + } + } +} + +static void +write_monocolor_pixels2( const GLcontext *ctx, + GLuint n, const GLint x[], const GLint y[], + const GLchan color[4], const GLubyte mask[] ) +{ + OSMesaContext osmesa = OSMESA_CONTEXT(ctx); + GLuint i; + GLushort pixel; + PACK_RGB_565(pixel, color[RCOMP], color[GCOMP], color[BCOMP]); + for (i = 0; i < n; i++) { + if (mask[i]) { + GLushort *ptr2 = (GLushort *) PIXELADDR2(x[i],y[i]); + *ptr2 = pixel; + } + } +} + +static void +read_rgba_span2( const GLcontext *ctx, + GLuint n, GLint x, GLint y, + GLubyte rgba[][4] ) +{ + OSMesaContext osmesa = OSMESA_CONTEXT(ctx); + GLuint i; + const GLushort *ptr2 = (const GLushort *) PIXELADDR2(x, y); + for (i = 0; i < n; i++, ptr2++) { + /* This should be fixed to get the low bits right */ + rgba[i][RCOMP] = (*ptr2 >> 8) & 0xFe; + rgba[i][GCOMP] = (*ptr2 >> 3) & 0xFc; + rgba[i][BCOMP] = (*ptr2 << 3) & 0xFe; + rgba[i][ACOMP] = 0; + } +} + +static void +read_rgba_pixels2( const GLcontext *ctx, + GLuint n, const GLint x[], const GLint y[], + GLubyte rgba[][4], const GLubyte mask[] ) +{ + OSMesaContext osmesa = OSMESA_CONTEXT(ctx); + GLuint i; + for (i = 0; i < n; i++) { + if (mask[i]) { + /* This should be fixed to get the low bits right */ + const GLushort *ptr2 = (const GLushort *) PIXELADDR2(x[i],y[i]); + rgba[i][RCOMP] = (*ptr2 >> 8) & 0xFE; + rgba[i][GCOMP] = (*ptr2 >> 3) & 0xFC; + rgba[i][BCOMP] = (*ptr2 << 3) & 0xFE; + rgba[i][ACOMP] = 0; + } + } +} + + + +/**********************************************************************/ /***** Read/write spans/arrays of CI pixels *****/ /**********************************************************************/ @@ -1830,6 +2030,15 @@ static void osmesa_update_state( GLcontext *ctx, GLuint new_state ) swdd->ReadRGBASpan = read_rgba_span3; swdd->ReadRGBAPixels = read_rgba_pixels3; } + else if (osmesa->format == OSMESA_RGB_565) { + swdd->WriteRGBASpan = write_rgba_span2; + swdd->WriteRGBSpan = write_rgb_span2; + swdd->WriteMonoRGBASpan = write_monocolor_span2; + swdd->WriteRGBAPixels = write_rgba_pixels2; + swdd->WriteMonoRGBAPixels = write_monocolor_pixels2; + swdd->ReadRGBASpan = read_rgba_span2; + swdd->ReadRGBAPixels = read_rgba_pixels2; + } else { /* 4 GLchan / pixel in frame buffer */ swdd->WriteRGBSpan = write_rgb_span; |