initial commit

1 files changed, 187 insertions, 0 deletions

diff --git a/third_party/gldc/src/private.h b/third_party/gldc/src/private.h
new file mode 100644
index 0000000..ed80647
--- /dev/null
+++ b/third_party/gldc/src/private.h
@@ -0,0 +1,187 @@
+#ifndef PRIVATE_H
+#define PRIVATE_H
+
+#include <stdint.h>
+#include <stdio.h>
+
+#include "sh4.h"
+#include "types.h"
+#include "aligned_vector.h"
+
+#define MAX_TEXTURE_COUNT 768
+
+
+#define GL_SCISSOR_TEST     0x0008
+#define GL_NEAREST          0x2600
+#define GL_LINEAR           0x2601
+#define GL_OUT_OF_MEMORY    0x0505
+
+#define GLushort   unsigned short
+#define GLuint     unsigned int
+#define GLenum     unsigned int
+#define GLubyte    unsigned char
+#define GLboolean  unsigned char
+
+#define GL_FALSE   0
+#define GL_TRUE    1
+
+
+void glClearDepth(float depth);
+
+GLuint gldcGenTexture(void);
+void   gldcDeleteTexture(GLuint texture);
+void   gldcBindTexture(GLuint texture);
+
+/* Loads texture from SH4 RAM into PVR VRAM */
+int  gldcAllocTexture(int w, int h, int format);
+void gldcGetTexture(void** data, int* width, int* height);
+
+void glViewport(int x, int y, int width, int height);
+void glScissor( int x, int y, int width, int height);
+
+void glKosInit();
+void glKosSwapBuffers();
+
+
+extern void* memcpy4 (void *dest, const void *src, size_t count);
+
+#define GL_NO_INSTRUMENT inline __attribute__((no_instrument_function))
+#define GL_INLINE_DEBUG GL_NO_INSTRUMENT __attribute__((always_inline))
+#define GL_FORCE_INLINE static GL_INLINE_DEBUG
+#define _GL_UNUSED(x) (void)(x)
+
+#define TRACE_ENABLED 0
+#define TRACE() if(TRACE_ENABLED) {fprintf(stderr, "%s\n", __func__);} (void) 0
+
+typedef struct {
+    unsigned int flags;      /* Constant PVR_CMD_USERCLIP */
+    unsigned int d1, d2, d3; /* Ignored for this type */
+    unsigned int sx,         /* Start x */
+             sy,         /* Start y */
+             ex,         /* End x */
+             ey;         /* End y */
+} PVRTileClipCommand; /* Tile Clip command for the pvr */
+
+typedef struct {
+    unsigned int list_type;
+    AlignedVector vector;
+} PolyList;
+
+typedef struct {
+    float x_plus_hwidth;
+    float y_plus_hheight;
+    float hwidth;  /* width * 0.5f */
+    float hheight; /* height * 0.5f */
+} Viewport;
+
+extern Viewport VIEWPORT;
+
+typedef struct {
+    //0
+    GLuint   index;
+    GLuint   color; /* This is the PVR texture format */
+    //8
+    GLenum minFilter;
+    GLenum magFilter;
+    //16
+    void *data;
+    //20
+    GLushort width;
+    GLushort height;
+    // 24
+    GLushort  mipmap;  /* Bitmask of supplied mipmap levels */
+    // 26
+    GLubyte mipmap_bias;
+    GLubyte _pad3;
+    // 28
+    GLushort _pad0;
+    // 30
+    GLubyte _pad1;
+    GLubyte _pad2;
+} __attribute__((aligned(32))) TextureObject;
+
+
+GL_FORCE_INLINE void memcpy_vertex(Vertex *dest, const Vertex *src) {
+#ifdef __DREAMCAST__
+    _Complex float double_scratch;
+
+    asm volatile (
+        "fschg\n\t"
+        "clrs\n\t"
+        ".align 2\n\t"
+        "fmov.d @%[in]+, %[scratch]\n\t"
+        "fmov.d %[scratch], @%[out]\n\t"
+        "fmov.d @%[in]+, %[scratch]\n\t"
+        "add #8, %[out]\n\t"
+        "fmov.d %[scratch], @%[out]\n\t"
+        "fmov.d @%[in]+, %[scratch]\n\t"
+        "add #8, %[out]\n\t"
+        "fmov.d %[scratch], @%[out]\n\t"
+        "fmov.d @%[in], %[scratch]\n\t"
+        "add #8, %[out]\n\t"
+        "fmov.d %[scratch], @%[out]\n\t"
+        "fschg\n"
+        : [in] "+&r" ((uint32_t) src), [scratch] "=&d" (double_scratch), [out] "+&r" ((uint32_t) dest)
+        :
+        : "t", "memory" // clobbers
+    );
+#else
+    *dest = *src;
+#endif
+}
+
+void _glInitContext();
+void _glInitSubmissionTarget();
+void _glInitTextures();
+
+extern TextureObject* TEXTURE_ACTIVE;
+extern GLboolean TEXTURES_ENABLED;
+
+extern GLboolean DEPTH_TEST_ENABLED;
+extern GLboolean DEPTH_MASK_ENABLED;
+
+extern GLboolean CULLING_ENABLED;
+
+extern GLboolean FOG_ENABLED;
+extern GLboolean ALPHA_TEST_ENABLED;
+extern GLboolean BLEND_ENABLED;
+
+extern GLboolean SCISSOR_TEST_ENABLED;
+extern GLenum SHADE_MODEL;
+extern GLboolean AUTOSORT_ENABLED;
+
+
+extern PolyList OP_LIST;
+extern PolyList PT_LIST;
+extern PolyList TR_LIST;
+
+GL_FORCE_INLINE PolyList* _glActivePolyList() {
+    if(BLEND_ENABLED) {
+        return &TR_LIST;
+    } else if(ALPHA_TEST_ENABLED) {
+        return &PT_LIST;
+    } else {
+        return &OP_LIST;
+    }
+}
+
+/* Memory allocation extension (GL_KOS_texture_memory_management) */
+void glDefragmentTextureMemory_KOS(void);
+
+GLuint _glFreeTextureMemory(void);
+GLuint _glUsedTextureMemory(void);
+GLuint _glFreeContiguousTextureMemory(void);
+
+void _glApplyScissor(int force);
+
+extern GLboolean STATE_DIRTY;
+
+
+/* This is from KOS pvr_buffers.c */
+#define PVR_MIN_Z 0.0001f
+
+#define MIN(a,b) (((a)<(b))?(a):(b))
+#define MAX(a,b) (((a)>(b))?(a):(b))
+#define CLAMP( X, _MIN, _MAX )  ( (X)<(_MIN) ? (_MIN) : ((X)>(_MAX) ? (_MAX) : (X)) )
+
+#endif // PRIVATE_H